1. I could use some guidance with a question that says "Find f^-1(3)"

Given: F(x)= 3 + x^2 + tan(PIx/2), where -1 < x < 1

I know I should find the inverse first then plug in 3 and solve. I just cannot get the inverse...

First swap x and y, but after that I cannot think of how to isolate y. I have...

x = 3 + y^2 + tan(PIy/2)

Same problem thing with

2. y = 3 + x + e^x find g^-1(4)

what is "e" just a normal variable? The book says the answer is zero...

Thanks a bunch!

Tjvelcro