Ada yg mau bantu saya tolong pakai cara

semoga membantu.........

u = 4x - 3 , v = -x - 1
u ' = 4 , v ' = -1
f ' x = (u'.v - u.v')/v^2
= (4(-x - 1) - (4x - 3)-1)/(-x - 1)^2
= (-4x - 4 + 4x - 3)/(-x - 1)^2
= -7/(-x - 1)^2
semoga terbantu ya...