derive x/(1-x^2) - Wolfram|Alpha How on earth does 1-x^2 become x^2-1?! Thanks.
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This is because, for square functions f(-x) = f(x)
Last edited by jakncoke; February 24th 2013 at 04:45 PM.
Originally Posted by jakncoke Doh..I did suspect that, but I dismissed it as being too far out. Why go through the step of re-arranging it. Weird calculator.
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