Hello, I need help please. For question #3 and #4. Thank you.

A 2 In x+1 3 Find y' if y = x ex - ex 4 Let y = f(x) = 2 a Find y'. b) Show that y' = V1+ y . C) Use b) and the fact that if y' = F(y), (v-') = F (x to find (y-1 ) _ d f-1(x). dx