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calculus

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find the taylor series f(x)1/2(e^x + e^-x) ;x=0

  • calculus - ,

    since this is just f(x) = cosh(x), and the derivatives are sinh,cosh,sinh,cosh,...
    f(x) = 1 + x^2/2! + x^4/4! + x^6/6! + ...

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