Arnav Chauhan

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How do I, algebraically, find the inverse function to f(x) = 2x/(x^2-1) ? 

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Say x^6 - 64 = f(x). The domain of this function is (-infty,infty). But   f(x)/(x-2) is a continuous graph and does not have any breaks at x=2. Why is this? If it is because it is divisible by (x-2...

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If natural numbers are defined to NOT include 0. Why do they include numbers with digits 0??