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Math Help - Finding value of x for which series is convergent

  1. #1
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    Finding value of x for which series is convergent

    Hi,

    I'm not sure how to solve this question. Finding value of x for which series is convergent-untitled.jpg
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    Re: Finding value of x for which series is convergent

    Sorry I have to post a small picture, I don't know how to type math symbols on this forum. And thanks in advance.
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    Re: Finding value of x for which series is convergent

    Quote Originally Posted by verasi View Post
    Hi,

    I'm not sure how to solve this question. Click image for larger version. 

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    There's a problem. I presume that your summation is this:
    \sum_{x = 1}^{\infty} (x + 1)

    x here is a dummy variable, which means that you can't pick out an x for this to be true. The sum does not depend on x.

    As far as LaTeX is concerned, we have a forum for that. See here.

    -Dan
    Thanks from MarkFL
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    Re: Finding value of x for which series is convergent

    Yah when I look at this question I was really confused. I'm not sure if my teacher wanted me to put in an expression or something. It was written as {(x+1)} superscript infinity subscript 1, but I'm assuming that means the same thing as what I typed in the original post.

    Also, thanks for telling me how to type equations. I can't figure out how to type superscript and subscript on top of each other. Sorry
    Last edited by verasi; December 9th 2012 at 11:25 AM.
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    Re: Finding value of x for which series is convergent

    Quote Originally Posted by verasi View Post
    Yah when I look at this question I was really confused. I'm not sure if my teacher wanted me to put in an expression or something. It was written as {(x+1)} superscript infinity subscript 1, but I'm assuming that means the same thing as what I typed in the original post.

    Also, thanks for telling me how to type equations. I can't figure out how to type superscript and subscript on top of each other. Sorry


    [tex]\sum\limits_{k = 1}^\infty {\left( {x + 1} \right)} [/tex] gives  \sum\limits_{k = 1}^\infty  {\left( {x + 1} \right)}
    Click on the “go advanced” tab. On the toolbar you will see \boxed{\Sigma} clicking on that give the LaTeX wraps, [tex] [/tex]. The code goes between them.

    This series converges for only one value if x, x=-1.
     \sum\limits_{k = 1}^\infty  {\left( {x + 1} \right)}

    Could that be what was meant?
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    Re: Finding value of x for which series is convergent

    I think that's what it means. Thanks for the answer
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