Question
On what interval is the formula $\frac{d}{d x}\left(\tanh ^{-1} x\right)=\frac{1}{1-x^{2}}$ valid?
Step 1
Step 1: The derivative of the inverse hyperbolic tangent function is given by the formula $\frac{d}{d x}\left(\tanh ^{-1} x\right)=\frac{1}{1-x^{2}}$. Show more…
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