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Thread: Power series(infinite sum)

  1. #1
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    Power series(infinite sum)

    I don't understand this step... Is the second his derivate? If yes, shouldn't it be x^(n-1)?
    I mean... Why is it series of x^n?
    Appreciate your help

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    Attachment 39470
    Last edited by domy7997; Aug 16th 2019 at 08:51 AM.
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  2. #2
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    Re: Power series(infinite sum)

    attachment doesn't show
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  3. #3
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    Re: Power series(infinite sum)

    Quote Originally Posted by domy7997 View Post
    I don't understand this step... Is the second his derivate? If yes, shouldn't it be x^(n-1)?
    I mean... Why is it series of x^n?
    Appreciate your help
    Sent from my Redmi Note 4X using Tapatalk
    Attachment 39470
    Although I can see your sideways image, I have ni idea as to what it means.
    Why can't you simply state a question to be answered?
    Thanks from topsquark
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