9.f(x)=3^x+(1/2)^x
f'(x)=3^xln3+(1/2)^xln1/2
10.f'(x)=(x+2-3³√x)'=1+0-3× 1/3x^(1/3-³1)=
1-x^(-2/3)=1-1/³√x²
