Let fx-x-1-x-then f-1 isA- 0B- 2C- 1D- -2

The correct option is B 2Given f(x)=x 1/x f'(x)=1+1/x^2 ∴ f'( 1)=1+1/( 1)^2 i.e., f'( 1)=2 ...

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Algebra of Derivatives

Let fx=x-1/x,...

Question

Let $f (x) = x - \frac{1}{x}$ , then $f^{'} (- 1)$ is

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