solve using first principle of differenciation

Question

1)y=e^3x
2)y=1/3(x^2)^1/2

Answer 1

the derivative of e^f(x)= e^f(x) . d/dx [f(x)]
therefore

y'=e^3x.3

2) use chain rule
y'=1/6(x^2)^-1/2 . 2x