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Math Help - Convergence help

  1. #1
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    Convergence help

    Any help with these two would be highly appreciated! xx
    Attached Thumbnails Attached Thumbnails Convergence help-convergent1.jpg   Convergence help-convergent2.jpg  
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  2. #2
    Junior Member Kanwar245's Avatar
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    Re: Convergence help

    For the first one, divide both numerator and denominator by n^3, and then see what happens when n goes to infinity. You should get -2 as your answer.
    For the second one, use absolute convergence to see if that series converges, if it does that this series would also converge
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