jika f(x) = g(x).√x, g(4) =8, g'(4)=7, maka f'(4)=

f(x)=g(x)√x
f(x)/√x=g(x)
f(4)/√4=g(4)
f(4)/2=8
f(4)=16

g'(x)=[f'(x)√x-f(x)/2√x]/x
g'(4)=[f'(4)√4-f(4)/2√4]/4
7=[2f'(4)-16/4]/4
28=2f'(4)-4
24=2f'(4)
12=f'(4)