ini lagi kak tolong dong

f(x)=(2-6x)3
f'(x)=(-6)(3)(2-6x)2
f'(x)= -18(2-6x)2

jawabannya A

f (x) = ( 2-6x)₃
U = 2 - 6x
U' = -6 
f ' (x) = 3 .U' Uⁿ⁻¹
         = 3 . (-6) . (2-6x)³⁻¹
         = -18 ( 2-6x)²