Question

Turunan pertama fungsi y = x^3 cos x adalah ...

Answer 1

U=x'3 ,v=cosx, u'=3x'2 v'=-sinx
y'= u'v+uv'
y'=3x'2(cosx)+x'3(-sinx)

Answer 2

U=x³
v=cos x
u'=3x²
v'=- sin x
y'=u'v+uv'
y'=3x².cosx+x³.-sinx
y'=3x²cosx-x³sinx
y'=x²(3cosx-xsinx)