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March 28, 2017

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If y= (x-1)log(x-1)-(x+1)log(x+1), prove that dy/dx = log(x-1/1+x)

  • Class 12th Calculus - ,

    use the product rule

    dy/dx = (x-1)(1/(x-1)) + log(x-1) - [ (x+1)(1/(x+1)) + log(x+1) ]
    = 1 + log(x-1) - 1 - log(+1)
    = log [(x-1)/(x+1)]

    = RS , had you typed it correctly as log((x-1)/(1+x))

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