Question

Let f(x) =
$x - \frac{1}{x}$

then f'(-1) is

(with explanation)​

Answer 1

Answer:

The answer is 2

Step-by-step explanation:

Since f(x) = x - 1/x

So Differentiating both sides with respect to x

f'(x) = 1 + (1/x)^2

So

f'(-1) = 1+1 =2

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