The general method is to take a function , reverse the roles of x and y ( , then solve this equation for y ( .)

When doing this you need to be careful about domains and ranges. (The range of the function is the domain of the inverse function and visa versa.)

For example:

1)

Switch the roles of x and y:

Solve for y:

Thus .

Note, though, that since f(x) is only defined on that the inverse function is only defined on rather than .

2) .

You do this one. I get .

-Dan