jika f(3-2x)=(1+3x)^4 nilai f'(3)

f(3 - 2x) = (1 + 3x)⁴

Misal:
3 - 2x = a
x = 3 - a/2

Maka,
f(a) = (1 + 3(3 - a/2))⁴
f(a) = (1 + (9 - 3a/2))⁴
f(a) = (2 + 9 - 3a/2)⁴
f(a) = (11 - 3a/2)⁴
f(x) = (11 - 3x/2)⁴

f'(x) = (4(-3/2)(11 - 3x/2)³)
f'(3) = (4(-3/2)(11 - 3(3)/2)³)
f'(3) = (-6(11 - 9/2)³)
f'(3) = (-6(2/2)³)
f'(3) = -6(1) = -6