If f:R→(-1,1) defined by f(x)=10x-10-x10x+10-x is invertible, find f-1

If f: $R \to (- 1, 1)$ defined by f(x)= $\frac{10^{x} - 10^{- x}}{10^{x} + 10^{- x}}$ is invertible, find $f^{- 1}$

Matching exercise

Match the items on the right to the items on the left.

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