{"id":314012,"date":"2023-02-28T15:47:00","date_gmt":"2023-02-28T08:47:00","guid":{"rendered":"https:\/\/quipperhome.wpcomstaging.com\/?p=314012"},"modified":"2023-03-01T16:19:11","modified_gmt":"2023-03-01T09:19:11","slug":"integral-tentu","status":"publish","type":"post","link":"https:\/\/quipperhome.wpcomstaging.com\/mapel\/matematika\/integral-tentu\/","title":{"rendered":"Pahami Integral Tentu dari Pengertian, Sifat hingga Penerapannya"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1380\" height=\"920\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2023\/03\/school-board-with-math-calculations_23-2147849646.webp\" alt=\"\" class=\"wp-image-314017\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2023\/03\/school-board-with-math-calculations_23-2147849646.webp 1380w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2023\/03\/school-board-with-math-calculations_23-2147849646-768x512.webp 768w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2023\/03\/school-board-with-math-calculations_23-2147849646-1200x800.webp 1200w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2023\/03\/school-board-with-math-calculations_23-2147849646-1170x780.webp 1170w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2023\/03\/school-board-with-math-calculations_23-2147849646-585x390.webp?crop=1 585w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2023\/03\/school-board-with-math-calculations_23-2147849646-263x175.webp?crop=1 263w\" sizes=\"(max-width: 1380px) 100vw, 1380px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Hai Quipperian, saat belajar Matematika, pernahkah kamu diminta untuk menentukan luas bengun di bawah kurva? Misalnya, diketahui kurva gaussian, lalu kamu diminta untuk menentukan luasan mulai <em>x<\/em> = <em>a<\/em> sampai <em>x<\/em> = b? Coba perhatikan, luasan di bawah kurva itu bersifat kontinu, artinya tidak terputus-putus. Nah, cara paling mudah untuk menyelesaikan luasan di bawah kurva itu adalah menggunakan sistem integral tentu. Lalu, apa yang dimaksud integral tentu? Daripada penasaran, yuk simak selengkapnya!<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Pengertian Integral Tentu<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Integral tentu (<em>definite integral<\/em>) adalah integral yang memiliki batas-batas nilai tertentu, sehingga hasil akhirnya bisa ditentukan secara pasti. Batas-batas nilai itu merupakan nilai variabel dari fungsi yang telah diintegralkan. Dalam Matematika, integral tentu bisa dimanfaatkan untuk mencari luasan di bawah kurva, volume benda putar yang dibatasi oleh titik-titik tertentu, luas daerah yang dibatasi oleh kurva tertentu, dan masih banyak lainnya. Adapun contoh penulisan integral tertentu adalah sebagai berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/wJuwXgERwVEfDklr5CA2OfVRR21Pa2oKHcRy92VIehksjMe0zxwlfsA5u2tFaEGtOs3w6LtP8xCreczS841HuU5UUXU0uR-GCAW4kGbXrYtGgd740KgWBY4n8_XQSCvZK0G9RvIwjhD43ysJXZKdbA\" alt=\"\" width=\"203\" height=\"186\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dengan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>a<\/em> = batas bawah; dan<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>b<\/em> = batas atas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dari bentuk di atas, tentu kamu tahu kan perbedaan mendasar antara integral tentu dan tak tentu? Yapp, benarr. Perbedaan mendasar antara kedua integral terletak pada ada tidaknya batas-batas variabel, ya. Sementara itu, untuk langkah pengerjaan integralnya sama.<\/p>\n\n\n\n<div class=\"baca\">\n<p><span class=\"head_baca\">Baca Juga: <\/span> <a href=\"https:\/\/www.quipper.com\/id\/blog\/mapel\/matematika\/integral-tak-tentu\/\">Integral Tak Tentu: Pengertian, Sifat-sifat dan Contoh Soal<\/a><\/p>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Sifat-Sifat Integral Tentu<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sifat-sifat integral tentu berkaitan dengan kelinearitasannya, perubahan batas, serta penambahan batas. Adapun sifat-sifat yang dimaksud adalah:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Sifat Kelinearitasan<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sifat kelinearitas integral tentu sama seperti sifat-sifat integral tak tentu, yakni sebagai berikut.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Sifat pertama<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Sifat pertama merupakan sifat integral yang memuat suatu konstanta di depan fungsi seperti berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/Y8f7PtwZPmhQ0PDkgHwdjYjQEwygmPW7Aapu2iCvid5-FeTk0QTOby8Hf09fL_5YQZAUZqpX9iV3gT9659blfdgSS6JRT7zfV2gtmWx8yyI278wYIyBkwOtCv39yzoH4vW-CLZY9Y0T3K5ZjWT6JmQ\" alt=\"\" width=\"208\" height=\"66\"\/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Sifat kedua<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Sifat kedua berlaku pada integral penjumlahan dua fungsi seperti berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/9BNYHH3UqS9KWkbH5yBqwp76GDzXw4K-x9vJyN9AL-7rF9CMGRP2kM9bcNpr1_XTQU4x9cejeO_3MhKeuLHVeQ_gDyt2dlY2F6G-z2uLBxceZkO5mmCEpYML__3Gxa63ETi638UTWZlRLEAvhezavw\" alt=\"\" width=\"387\" height=\"69\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Proses integral penjumlahan dua fungsi bisa kamu jabarkan menjadi jumlah integral masing-masing fungsinya dengan batas yang sama.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Sifat ketiga<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Sifat ketiga berkaitan dengan integral pengurangan dua fungsi.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/Bxig3VQ8Jf6kST0sqK7xNOQQmKg4GwIYH_q0-v2rXTQ0QuQ5igB0VdOExPqwPPnahKUQTPSuILkQlXbXSG_QS-Bl4YeEnJkCAkGezmrM21ohXPVUzZUfB0c7UtTD0z7d5_j42EfHWEAoFRAm2Xn2Hw\" alt=\"\" width=\"413\" height=\"74\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Konsepnya sama dengan penjumlahan ya. Hanya saja pada pengurangan tidak berlaku sifat komutatif di mana <em>a<\/em> \u2013 <em>b<\/em> \u2260 <em>b<\/em> \u2013 <em>a<\/em>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Sifat Perubahan Batas<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sifat ini berlaku jika terdapat perubahan batas-batas integral. Perubahan itu bisa pembalikan batas atau penambahan batas.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Sifat pembalikan batas<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Batas integral suatu fungsi bisa dibalik dari <em>a<\/em> hingga <em>b<\/em> menjadi <em>b<\/em> hingga <em>a<\/em>, dengan syarat&nbsp; tanda fungsinya harus berlawanan, yakni sebagai berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/rD3DqxLlrs1yKtPkSSWncLaaR7ZqN0OTVBN_kjbdXB013c86ixI5HtTHlOJ1oHqbpGU4YqS1DvgQhm5Kk3KZy3dsdP8_qpGvCl0BTcSiCg3iq51-vqDhTk1Q4mmM0DRs-ccWkjShkbibI-80mC4tVA\" alt=\"\" width=\"239\" height=\"77\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Apakah hasilnya sama? Sudah tentu sama, ya. Jika tidak percaya, buktikan hasil integral berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/lYNDmnZlMXsoRLeCb3OWc4bi4ASh0hN2FajbEvxzpI5SeG7YgMZvqul4LqWFwkrMonOsCgVlRPF35gkLIQCeLBNhAln98ATYMt29UyqZBNOZ4Hz0DFL_tCJWg9xfWDnDJ8_UHDmpjSlD2skqrmb2BQ\" alt=\"\" width=\"193\" height=\"75\"\/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Sifat penambahan batas<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Selain dibalik, kamu juga bisa menambahkan batas-batas integral, misanya dari <em>a<\/em> hingga <em>b<\/em> menjadi <em>a<\/em> hingga <em>c<\/em>. Penambahan batas ini bisa kamu selesaikan dengan sifat berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/2Cj2yRYYpXguYb_9eRnB09lbzuc8b2Xnb3kq1-Q6LUrQdq0RUoxpCMa2zPw7XGDeFB-474AIEXRzUVLxStRbkVx84V0-KmioyTKy_1tO0dNAVGIAG-KsMR_So0UkY41rRHISMYiqfn0tD-Nu1JEYpA\" alt=\"\" width=\"314\" height=\"72\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Batas <em>a<\/em> hingga <em>c<\/em> bisa diuraikan menjadi <em>a<\/em> hingga <em>b<\/em> lalu <em>b<\/em> hingga <em>c<\/em>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Penerapan Integral Tentu<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Di dalam Matematika, sistem integral tentu ini biasa diterapkan untuk menyelesaikan masalah terkait fungsi kontinu. Misalnya, menentukan luasan di bawah kurva dan menentukan volume benda putar yang dibatasi oleh beberapa fungsi. Bagaimana caranya? Yuk, simak penjabaran di bawah ini.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Menentukan Luasan di bawah Kurva <\/strong><strong><em>f<\/em><\/strong><strong>(<\/strong><strong><em>x<\/em><\/strong><strong>) yang dibatasi Sumbu-x<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Apakah kamu pernah menjumpai soal-soal yang berkaitan dengan luas daerah di bawah kurva? Jika kurvanya berupa garis lurus, tentu cukup mudah ya, karena kamu bisa menggunakan rumus luas bangun datar. Namun, bagaimana jika kurvanya berupa garis lengkung?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Misalnya, daerah S berada di bawah kurva lengkung f(x) (syarat f(x) &gt; 0) dan di atas sumbu-x dengan batas bawah <em>x<\/em> = <em>a<\/em> dan batas atas <em>x<\/em> = b seperti berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/ZueCN671Cf4rtJgSvwnsMBrPnqX7jlIEdVJovMUi7OcsUkiCyB_5e_iqm59vXq-61rcTQhy5MPZBJ4-ULoYJ6Xw4OFD3omaRmGsV4TVQsafCVgXbzUD44VQtHSosIu7TRy9m2gK4Swdb9e4rr2jxiA\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Untuk menentukan luas daerah S, kamu bisa menggunakan sistem integral tentu seperti berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/QykGseljoQ6VMeNl_pVDDyyFfGAsGwGIqC0VeMBklLtWSWGDUqz7dLUX8Ys2ahg065vjeg76cIdPj3x4XCxN-3btOLG3QpXBs1oNxkd7GP5JQkBAE0qAZ3LWEkHIyWm1FK3IWzUpaHCD7z4BLNt08g\" alt=\"\" width=\"148\" height=\"75\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dengan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L<sub>S<\/sub> = luas S;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>a<\/em> = batas bawah;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>b<\/em> = batas atas; dan<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">f(x) = fungsi kurva.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ingat, jika kurvanya berada di bawah sumbu-x dan di sebelah kiri sumbu-y, maka kamu harus menambahkan tanda negatif di depan persamaan integralnya.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Agar semakin paham, simak contoh berikut.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tentukan luas daerah di bawah kurva <em>f<\/em>(<em>x<\/em>) = <em>x<\/em><sup>2<\/sup> + 1 yang dibatasi oleh sumbu-x dengan batas bawah <em>x<\/em> = -1 dan batas atas <em>x<\/em> = 0!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pembahasan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mula-mula, gambarkan terlebih dahulu luas daerah yang dimaksud.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/TVtfN-SutJEO6VCzzUgrePNSl8md0fKhNaCduobkk09jdwYZ1I0mHTwZXCxhfJbilq31o1cYoT0roTh9jQrc9YV6tS6zZbSYMIIaqTk9mzzsD1ftrfbHTjiTCWCD7Eo0y3Cu94Jfll2YSMdukOlSYQ\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Oleh karena luas daerah yang dimaksud berada di sebelah kiri sumbu-y, maka kamu harus menambahkan tanda negatif di depan persamaan integralnya, yakni sebagai berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/CcvixbinUKur1cE0h8XTBDm6O2ivAaqdkrx4Sw2ACilDWCxku6zuRxnHgATwKnNHoLxa1avWP9Pdto5G2AqLQqP9OYoI5QvnHmcYqTPXBfI5YUGy23iwKHOiP95b2moF-NMHRjweSVBnpwGGvLjdRg\" alt=\"\" width=\"231\" height=\"356\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Jadi, luas daerah yang dimaksud adalah 2\/3 satuan luas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Menentukan Luasan yang Dibatasi oleh Dua Kurva, <\/strong><strong><em>f<\/em><\/strong><strong>(<\/strong><strong><em>x<\/em><\/strong><strong>) dan <\/strong><strong><em>g<\/em><\/strong><strong>(<\/strong><strong><em>x<\/em><\/strong><strong>)<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sebelumnya, kamu sudah belajar cara menentukan luas daerah yang dibatasi oleh kurva f(x) dan sumbu-x. Kali ini, kamu akan belajar menentukan luas daerah yang dibatasi oleh dua kurva dengan fungsi berbeda. Perhatikan gambar berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/0TRX4dMOSoHoYPhsLoVk0_-TOrZ7wEAEfdRhYsQ6y3TM3CFyKdpKvszQJMNgv00Ap913BWu_RTg6v8OxynaJ3L1cG0swVq1Mqiu0gPQU5lu5KfK3_vilbhU4knjYdoEtvXFSuTN7kD2Lb53-04dycA\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Gambar di atas menunjukkan bahwa daerah S dibatasi oleh kurva f(x) dan g(x) dengan batas bawah <em>x<\/em> = <em>a<\/em> dan batas atas <em>x<\/em> = <em>b<\/em>. Luas daerah S bisa ditentukan dengan persamaan integral berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/zLRnkujC-ZT4DeAfhzS-PnlXzQcmXq-0pSpRx9SBU8yUbyqpOtwjJpJ3reYZ3xG6i3hWYM4xX32__D5Tq3P7d-amH6afa6hF9W54fuKBsoltZCcvTRm4igkr7tN3rSt0NVsH1NxBzbgxo7ndy2oURA\" alt=\"\" width=\"211\" height=\"137\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dengan ketentuan: <em>f<\/em>(<em>x<\/em>) \u2265 <em>g<\/em>(<em>x<\/em>).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ada poin penting yang harus Quipperian perhatikan saat menyelesaikan luas yang dibatasi dua kurva, yakni kurva yang membatasi luas daerah bagian atas berfungsi sebagai <em>f<\/em>(<em>x<\/em>). sementara kurva yang membatasi luas daerah bagian bawah berfungsi sebagai <em>g<\/em>(<em>x<\/em>). Itu artinya, penentuan f(x) maupun g(x) tidak boleh asal.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Agar semakin paham, yuk simak contoh berikut.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tentukan luas daerah yang dibatasi oleh kurva y = -x<sup>2<\/sup> + 3x dan y = x<sup>2<\/sup> dengan batas bawah <em>x<\/em> = 0 sampai <em>x<\/em> = 1!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pembahasan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mula-mula, kamu harus menggambarkan luas daerah yang dimaksud.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/YWQ3DkdUWI8np24pfk8FNE2e6kgMYmMm9wW4GtJBUSYkVkNfhE0CXWAEuUSMt0SdQDG6YjqO9YEz_nw5YSWOHD0D_v__egvoNccbPVYmJ59QXCXxDAmtgMZXkhBX5Kjt_79oHtpEV1FziEyftobB-Q\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Luas daerah yang dibatasi oleh kurva y = -x<sup>2<\/sup> + 3x dan y = x<sup>2<\/sup> dengan batas bawah <em>x<\/em> = 0 sampai <em>x<\/em> = 1 diberi arsiran warna biru. Dari gambar di atas, terlihat bahwa bagian atas daerah yang diarsir dibatasi oleh y =- x<sup>2<\/sup> + 3x dan bagian bawahnya dibatasi y = x<sup>2<\/sup>. Untuk menentukan luas daerah tersebut, gunakan persamaan berikut.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/TI3e48UC--Fj-RF_ihe4N51SmHKdsTDSYPaPSK4P12_XyZjbjqvqIJtMSaT35jTZ3AL5U0IMn1kM03jQEsWvnLD8xgxQXH5E2fEo2a813WLXVYGAZH49eaU8urz9lUuZQ3sqL0lgJ8PVrIqW0vf2jQ\" alt=\"\" width=\"263\" height=\"352\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Jadi, luas daerah yang dibatasi oleh kurva y = -x<sup>2<\/sup> + 3x dan y = x<sup>2<\/sup> dengan batas bawah <em>x<\/em> = 0 sampai <em>x<\/em> = 1 adalah 5\/6 satuan luas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Menentukan Volume Benda Putar Satu Kurva yang Mengelilingi Sumbu-x<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Siapa sangka jika volume benda putar bisa tentukan dengan mekanisme integral <em>lho<\/em>. Misalnya, suatu kurva diputar mengelilingi sumbu-x sejauh 360<sup>o<\/sup> seperti berikut ini.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/WEp1z9g355-CiQMeCEJ1Vaur381lZYrmg924gp45GGZv8iNi0-xGi_qrGcCEN81IWr1IMsuhM_-W8oeju8AWsnlib3KbRVB2ndjSg8OEQiqHc4vP3SnXOzzroE2E0NGvvChvngF6csmeCpgwec4-Dw\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Untuk menentukan volume hasil putaran kurva mengelilingi sumbu-x, gunakan persamaan seperti di bawah ini.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/zzmJzkDwwgi-TBgBLuWVhQ5tBG-hgvU1eEn1NB9BTLC8HfZNSscCAHkRVFsCTVtlULbk3g8Ns3dtIc8RRfMdudlpCimmOl55UH7JpYbMdIpxiOf6CRKBvREhiRJLDy4bDQ3mE8qmsXFP7f2MNBg7MQ\" alt=\"\" width=\"246\" height=\"71\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dengan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>V<\/em> = volume benda putar;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>f(x) <\/em>= fungsi kurva;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>a<\/em> = batas bawah; dan<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>b<\/em> = batas atas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Menentukan Volume Benda Putar Satu Kurva Mengelilingi Sumbu-y<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Mekanisme integral juga bisa digunakan untuk menentukan volume benda putar satu kurva yang diputar mengelilingi sumbu-y. Jika digambarkan, menjadi seperti berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/OsiSLgACQh7_pngP32XMGyRCTSprGlolH_fYeGd5g9ZDcnVtImLwwCrmK3M_PoBl7-RDIspyBA0V99laqpskb9cIwqOA1-rAQh5vZgFZxBR3O4xG8YvJds84RgALKUd5lyXSCOQwiO3csN_gVq-ymg\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Daerah hasil putaran memiliki batas bawah <em>y<\/em> = <em>c<\/em> dan batas atas <em>y<\/em> = <em>d<\/em>. Lalu, bagaimana cara menentukan volume benda putar tersebut? Untuk menentukan volumenya, gunakan persamaan berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/ywr2qzYJvdPwJtM3qtqoPJ-LQ4A66sZJgLJoA4X46xeL_hIKz8NHG2Qr2yZxmtffUpnKCNE9yvezKpi5c8lp0o-08ugSHmihqpGjk8grqOKwC9dPB4uaOPjWaGVWvCaV-POj78jEKW1ro5oZ_QaXIg\" alt=\"\" width=\"266\" height=\"77\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dengan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>V<\/em> = volume benda putar;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>f(y) <\/em>= fungsi kurva;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>c<\/em> = batas bawah; dan<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>d<\/em> = batas atas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Menentukan Volume Benda Putar Dua Kurva Mengelilingi Sumbu-x<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Apabila dua kurva yang saling sejajar diputar mengelilingi sumbu-x sejauh 360<sup>o<\/sup>, maka akan terbentuk daerah volume seperti berikut.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Volume benda putar terhadap sumbu-x yang dibatasi oleh dua kurva bisa ditentukan dengan persamaan di bawah ini.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/JzKEMgoDBve-SurfNKL54TCDLKxkHpH5EGxq54uaIPXHg7auNc1rO_ZZfvt-_tkmRDuFLToVl0rNBcFMAyaxIu8lbAQQWNZuYCsgLF0JfeuA31m_R-vYOO3Dvd6V4kdupLZDEbDJFHS53Bs1r01bJg\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Volume benda putar yang dibatasi oleh dua kurva tersebut bisa ditentukan dengan persamaan di bawah ini.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/fIEJ7cFEGHlwZ5YuC2op87y9DLTzO8rNTkn8aUmonCG2-gONn1hRrY1g1HLoB8_dgSE5dzZ9AK9zo6ChCt_ej_MTLZgpqk1K9oXxRN7eD_w8R2t5Ek17elEViTbeP3VC1xALmOBZRjjTPr4KFDFXrA\" alt=\"\" width=\"347\" height=\"61\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Menentukan Volume Benda Putar Dua Kurva Mengelilingi Sumbu-y<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Langkah untuk menentukan volume benda putar dua kurva mengelilingi sumbu-y ini diawali sama seperti benda putar lain, yakni menggunakan mekanisme integral.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/nRIgFWQgulCsQ_FJB0RboCd_cB3fKIIYxTeYuyg74soOu6yaM8AzjWHXpGDWbcXM6cxIAeGBn3I5W-0NuCS9bUPLkdOzGVM5-5QoKr09z9ALyj-xwRLXXGQat59d5hBq6cgBkYiP8r1YgxavZYaTPw\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Adapun persamaan integral untuk menentukan volume benda putar di atas adalah sebagai berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/0HS-9wq8dNnV0pte9oG2JlyixqAwGAOhB-jWeROOzZQBfmm4yljs5lIVE-kYJwylotuL46lPiOfHu3jug8MRk19RKDcL9qrXzCCbnwsgcsGsPm14HjMHwkqH6qyu6_jaUJhBrxwNrY5XOD5iS9dMbQ\" alt=\"\" width=\"328\" height=\"57\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Sampai sini, apakah Quipperian sudah paham?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jika sudah, yuk beralih ke contoh soal!<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Contoh Soal Integral Tentu<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Contoh soal integral kali ini berkaitan dengan volume benda putar, ya.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Contoh Soal 1<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tentukan volume benda putar yang dibatasi oleh <em>y<\/em> = <em>x<\/em> + 3 dan diputar 360<sup>o<\/sup> terhadap sumbu-x dengan batas <em>x<\/em> = 1 dan <em>x<\/em> = 3!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pembahasan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Volume benda putarnya bisa kamu tentukan dengan cara berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/3YdyasTcGigyS3I3802eTmjZHciv9-fQbyfvVMs3GWq_CN_kkbf4lz7pvqQlCB_V4qSC2_KSeDp_TCWAgC5kpePdVLKveYOE_PeYEhIJU4zFGYo4QRXuDYq8DQRbTKJiJF6QESZtpxQi-Y9cBFrnJg\" alt=\"\" width=\"394\" height=\"536\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Jadi, volume benda putarnya <sub><\/sub>satuan volume.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Contoh Soal 2<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tentukan volume benda putar yang dibatasi oleh kurva <em>y<\/em> = 9 \u2013 <em>x<\/em><sup>2<\/sup> dan diputar terhadap sumbu-y sejauh 360<sup>o<\/sup>!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pembahasan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Oleh karena diputar terhadap sumbu-y, maka kamu harus mengubah persamaan fungsinya dalam <em>y<\/em>.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/ylRayIPZnWX-PDiQi1I8LzdpT0nn-nlzrO-vg-cAJNPeJtmghc5MSjEu8t-MvAKm-gd4wYvvkwDLkHT7A9RdOHMnGwvqfooS772qs8BC2GQEx4lHfY5m2ERfC3vD0aoCLv_KNdSsmruSu1_xzVu7tg\" alt=\"\" width=\"119\" height=\"67\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Selanjutnya, tentukan batas pada sumbu-y dengan menggambarkan fungsi tersebut pada koordinat Cartesius.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/LloEOUioOpdWWsY_jJEyYL-A6FU-3vGEJJ4vcQ2LQkllwPcLA3UDop_N7-_imyTLroRx67w7J61L-ssyF3DFtl1Dv3a31yS7osGRl0z_p3Xt9jU0GMieYMPu9v-QJguoQaqjIpIhAFSNLaRVGLIncw\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dari kurva di atas diperoleh batas bawahnya <em>y<\/em> = 0 dan batas atas <em>y<\/em> = 9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lalu, substitusikan nilai <em>x<\/em><sup>2<\/sup> pada persamaan volume kurva yang diputar mengelilingi sumbu-y.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/__88_CrTeYWn4byfxIIOuS3goyYyBUWQ6gkMrejZtt6tyowBQKB07-fWE81lujsmpX2nOc5fKdt_iMuGDHuqeU0tLYhHKgC6jhi1KvElWrbHu6-C3poVVjouOSqBVYb0QgHRBnYA886CPU4KEg3pZg\" alt=\"\" width=\"208\" height=\"296\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Jadi, volume benda putarnya adalah <sub><\/sub>satuan volume.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Contoh Soal 2<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Diketahui kurva <sub><\/sub>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tentukan perbandingan volume benda putarnya jika kurva diputar mengelilingi sumbu-x dan sumbu-y sejauh 360<sup>o<\/sup> dengan batas bawah <em>x<\/em> = 0 dan batas atas <em>x<\/em> = 4!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pembahasan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mula-mula, gambarkan dahulu bentuk kurvanya agar kamu tahu batas-batas yang memenuhi pada sumbu-y.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/6tTUqXPkhJQeIEkjBMQyAiOu2r7Ztov97BUmYAgOrhfn19p62Euk32zMM2TyKVaZEleSyGr4BN-nKom26KsAeUjs1N8xxq7lNy6gyKH2oZwQcivvUCFIachbSL5v_81gqY4z4RGASqn0IMJTluFUxw\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Jika batas bawah sumbu-x = 0 dan batas atasnya = 4, maka dihasilkan batas bawah sumbu-y = 0 dengan batas atas = 6. Itu artinya:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>x<\/em> = 0 dan <em>x<\/em> = 4<\/li>\n\n\n\n<li><em>y<\/em> = 0 dan <em>y<\/em> = 6<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Lalu, tentukan volume benda putar jika kurva diputar sejauh 360<sup>o<\/sup> terhadap sumbu-x.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/PN2J5597sJ25CzcFHApjQANoF7qkyLcAIbJ7KONXA2W4ByBwJsrgOwsTlTfadQ7P4fPhCq3VaQSXmkxZtld1bRGrFYRPKusYxuqdYcLIH-DMxT1TGPPwhD9uMr_PijEl2wxEYmgD3KKOpxrDi60tVA\" alt=\"\" width=\"187\" height=\"402\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Selanjutnya, tentukan volume benda putar jika kurva diputar terhadap sumbu-y sejauh 360<sup>o<\/sup>.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/YHSo1WExp-c4y6ZljYzbWVI6L5I7blc_pKwdfpQRuHPw-UFGHbIhDPHbG0YH0n7RvrQ7HgJr4UnfoV7uxDwo_fFGkcv9yAv5l0NqfuOJrozcI0-y-8vSnbhR_11gAyTOGGme59gV6IeJ5zT-rmCu8w\" alt=\"\" width=\"119\" height=\"160\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Substitusikan nilai <em>x<\/em><sup>2<\/sup> pada persamaan volume benda putar <em>V<\/em><sub>y<\/sub>.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/0lafB8APLfr6KzSxVUIclHuKA3067j0cJLtTeWx8rhJFXwpT6oxBidXYoCNTKE4uKpUfTfTqy0C0KIUBRrl1a6npRRgYaL-rX1rjcOr9ddjcWX5T9U4rNVoC15ne2P_JaxpCSQDo1XTrkWBaQ_NIEg\" alt=\"\" width=\"193\" height=\"386\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dengan demikian, perbandingan antara <em>V<\/em><em><sub>X<\/sub><\/em><em> dan V<\/em><em><sub>Y<\/sub><\/em> adalah sebagai berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/jygJ6143eeZn46cK0rJROLlfc_MYovZXu37OSK8tvP_EZIPBtloqCbhRoLDMmE068muxf8N8jPsqveXWzWGrZFF-ybaQeo87r5-gns8p2rompsHMRaf2LRemEI_zl6HOZHT3gARMLpAAjzRYh1xpSg\" alt=\"\" width=\"104\" height=\"175\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Jadi, perbandingan volume benda saat kurva diputar terhadap sumbu-x dan sumbu-y adalah 5 : 4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Itulah pembahasan Quipper Blog kali ini. Semoga bermanfaat, ya. Untuk mendapatkan materi lengkapnya, yuk buruan gabung Quipper Video. Salam Quipper!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hai Quipperian, saat belajar Matematika, pernahkah kamu diminta untuk menentukan luas bengun di bawah kurva? Misalnya, diketahui kurva gaussian, lalu kamu diminta untuk menentukan&hellip;<\/p>\n","protected":false},"author":156447303,"featured_media":314017,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_wpcom_ai_launchpad_first_post":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[679384865],"tags":[],"ppma_author":[679386823,679386836],"class_list":["post-314012","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-matematika"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pahami Integral Tentu dari Pengertian, Sifat hingga Penerapannya - Quipper Blog<\/title>\n<meta name=\"description\" content=\"integral tentu adalah integral yang memiliki batas-batas nilai tertentu, sehingga hasil akhirnya bisa ditentukan secara pasti. 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