5.
1st step
Replace f(x) with y:
2nd step:
Replace every x with a y and replace every y with an x:
3rd step:
Solve for y:
4th step:
Replace y with f^-1(x)
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The domain of f^-1(x) will be given by:
Since we can't divide by zero, so:
The range of f^-1(x) will be the domain of f(x), the domain of f(x) is given by:
Because we can't divide by zero, so:
Therefore, the range of f^-1(x) is: