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Math Help - help with critical points

  1. #1
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    help with critical points

    Find all the critical points
    f'(x)=ln(2/(1+x^{2}))
    I know you set the equation to 0
    0=ln(2/(1+x^{2})) but not sure how to solve it
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by vinson24 View Post
    Find all the critical points
    f'(x)=\ln(2/(1+x^{2}))
    I know you set the equation to 0
    0=\ln(2/(1+x^{2})) but not sure how to solve it
    \ln\left(\frac{2}{1+x^{2}}\right)=\ln(2) -\ln(1+x^2)=0

    So the critical points are the roots of:

    \ln(1+x^2)=\ln(2)

    or of:

    1+x^2=2

    CB
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