Decide if each function is invertible

y=x^2

y=x^3

y=x^4

y=2^x

y=e^x

y=1/x

y=1/x^2

y=sinx

y=cosx

y=tanx

If the function is,

- find a formula for its inverse function

-sketch the inverse function.

If the function is not,

-what interval could you restrict it to to make it invertible?

-find a formula for the inverse of the restricted function

-sketch the inverse of the restricted function.