What is the answer to f=f^{-1} ?

The answer to f=f^{-1} is f=1,f=-1

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f=f^{-1}

f = f^{- 1}

f = 1, f = - 1

Solution steps

f = f^{- 1}

Refine

f = \frac{1}{f}

Multiply both sides by

f

f^{2} = 1

Solve

f^{2} = 1 : f = 1, f = - 1

f = 1, f = - 1

Verify Solutions

Find undefined (singularity) points:

f = 0

Combine undefined points with solutions:

f = 1, f = - 1

b, 8 v + 8 b = 240

4 x + 3 = - \frac{x}{5} - \frac{3}{2}

- 3 c - 4 = 2

x, 4 = x + y

3 (2 (a - 2) + a) = 6 + a - 3