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Math Help - Help solving this integral

  1. #1
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    Help solving this integral

    Help solving this integral-codecogseqn.gif

    I tried substituting u=2x in and solving it , but it didnt work. Can someone please help me get started?
    Thanks
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  2. #2
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    Re: Help solving this integral

    show what you did so maybe someone can see why "it didn't work" ...
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  3. #3
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    Re: Help solving this integral

    If you changed the base from 13 to e, would that help?
    Thanks from topsquark
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  4. #4
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    Re: Help solving this integral

    Quote Originally Posted by nubshat View Post
    Click image for larger version. 

Name:	CodeCogsEqn.gif 
Views:	23 
Size:	614 Bytes 
ID:	25862

    I tried substituting u=2x in and solving it , but it didnt work. Can someone please help me get started?
    Thanks
    Hint: (13^2)^x=169^x
    I gues now you know who's the "u".
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  5. #5
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    Re: Help solving this integral

    use the substitution y = 169^x
    ln y = x ln 169
    (1/y) dy/dx = ln 169
    dx = (1/ln 169) (dy/y)

    Now integrate. Hope this helps.
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