Matematika Kelas IX Turunan Fungsi... Mohon bantuannya untuk nomer 3&4

Diferensial


3.
f(x) = -12/ x^2(x^2/3)
= -12x^-(2+2/3)
= -12x^-8/3

maka
f'(x) = -8/3 (-12) x^-(8/3)-1
= 32 / x^11/3
= 32 / x^3 x^2/3
A


4.
f(x)
= 4x - 6(x-3) / x^2 -3x
= -2x + 18 / x^2 - 3x

u' = -2
v' = 2x- 3

f'(x)
= -2(x^2 - 3x) - (2x-3) (-2x +18) / (x^2 -3x)^2

f'(1)
= -2(-2) - (-1)(16) / 4
= 4 + 16/ 4
= 5

C