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f(x) = 4 - 8x
f'(x) => 4-8x = x'
4-x' = 8x
x = 4-x'
8
g(x) = 20x -7
25x -2
g'(x) => 20x - 7 = x'
25x - 2
20x-7 = x' (25x-2)
20x-7 = 25xx' - 2x'
-7 + 2x' = x (25x' - 20)
x = 2x' - 7
25x' - 20
B.) gof (x) => masukkan nilai f(x) ke dalam g(x)
20x - 7 => 20(4-8x) - 7 => 80 -160 x-7 => 73 - 160x
25x - 2 25(4-8x) -2 100 - 200x -2 98 - 200x
fog(x) => masukkan nilai g(x) ke dalam f(x)
C.) sama masukkan g'(x) ke dalam f'(x) dan f'(x) ke dalam fungsi g'(x)