lim ((x+h)^-2 - x^-2)/h as h->0 - Wolfram|Alpha I don't know where the answer is coming from. What are the missing steps?
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I have found I have done this question before. It involves making a common denominator.
Originally Posted by Stuck Man lim ((x+h)^-2 - x^-2)/h as h->0 - Wolfram|Alpha I don't know where the answer is coming from. What are the missing steps? Try getting a common denominator, then expanding the numerator...
finish it ...
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