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Materi Diferensial
By Muhammad Yani
2
Pengertian Diferensial
Turunan fungsi (diferensial) ialah fungsi lain dari suatu fungsi sebelumnya, misalnya fungsi f menjadi f’ yang memiliki nilai tak beraturan. Turunan ( diferensial ) dipakai sebagai suatu alat untuk menyelesaikan berbagai masalah dalam geometri dan mekanika.
Math 2022
Materi Diferensial
3
Rumus 1 :
Jika y = cxn dengan c dan n konstanta real , maka dy/dx = cn xn-1
contoh
y = 2x4 maka dy/dx = 4.2x4-1 = 8x3
Rumus Diferensial
DIFERENSIAL
4
Rumus 2 :
Jika y = c dengan c adalah konstanta maka dy/dx = 0
contoh
jika y = 6 maka turunannya adalah sama dengan nol (0)
Rumus Diferensial
DIFERENSIAL
5
Rumus 3 :
Jika y = f(x) + g(x) maka turunannya sama dengan turunan dari masing-masing fungsi = f'(x) + g'(x)
contohnya
x3 + 2x2 maka y’ = 3x2 + 4xy = 2x5 + 6
maka y’ = 10x4 + 0 = 10x4
Rumus Diferensial
DIFERENSIAL
6
Rumus 4 :
Turunan Perkalian Fungsi Jika y f(x).g(x) maka y’ = f'(x) . g(x) + g'(x) . f(x)
contoh
x2 (x2+2) makaf(x) = x2f'(x) = 2xg(x) = x2+2g'(x) = 2x
kita masukkan ke rumus y’ = f'(x) . g(x) + g'(x) . f(x)y’
= 2x (x2+2) + 2x . x2y’ = 4x3 + 4x
Rumus Diferensial
DIFERENSIAL
7
Rumus 5 : Turunan Pembagian Fungsi
coba kerjakan contoh soal berikut
Rumus Diferensial
DIFERENSIAL
8
Multiple Choice
Tentukan turunan pembagian dari fungsi berikut :
y = x2+1x
(x2+1)21−x2
(x2+2)21−x2
(x2+1)22−x2
(x2−2)21+x2
9
Apakah ada pertanyaan?
LET'S DISCUSS!
Materi Diferensial
By Muhammad Yani
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