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If f(x)=(1)/(x^2) , show that f(x+h)-f(x...

If `f(x)=(1)/(x^2)` , show that `f(x+h)-f(x-h)=-(4xh)/((x^2-h^2)^2)`.

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CHHAYA PUBLICATION-RELATION AND MAPPING -Very short answer type questions
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