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Math Help - series comparison test

  1. #1
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    series comparison test

    here is the problem: ImageShack - Image Hosting :: 46660570xz5.jpg

    i know the problem converges.

    i'm not sure what to compare it to, using the direct or limit comparison test.

    i did try to use n/(4^n)
    it kinda looks like a geometric series, but not sure.

    please help.

    thanks.
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  2. #2
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    \frac{n-1}{n \cdot 4^n} < \frac{1}{4^n} = \left(\frac{1}{4}\right)^n
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  3. #3
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    thankyou, i didn't see it that way, until now
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