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Math Help - Sum with limits

  1. #1
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    Sum with limits

    Hi

    How do you tex a sum with limits, i.e. sum from n=1 to infinity, or something like this? please
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  2. #2
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    Re: Sum with limits

    Quote Originally Posted by Shizaru View Post
    How do you tex a sum with limits, i.e. sum from n=1 to infinity, or something like this
    [TEX]\sum\limits_{k = 2}^\infty {\frac{{\left( { - 1} \right)^k }}{{2^{k + 1} }}} [/TEX] gives
    \sum\limits_{k = 2}^\infty  {\frac{{\left( { - 1} \right)^k }}{{2^{k + 1} }}}
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    MHF Contributor Also sprach Zarathustra's Avatar
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    Re: Sum with limits

    Quote Originally Posted by Plato View Post
    [TEX]\sum\limits_{k = 2}^\infty {\frac{{\left( { - 1} \right)^k }}{{2^{k + 1} }}} [/TEX] gives
    \sum\limits_{k = 2}^\infty  {\frac{{\left( { - 1} \right)^k }}{{2^{k + 1} }}}
    1/12
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  4. #4
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    Re: Sum with limits

    Quote Originally Posted by Also sprach Zarathustra View Post
    1/12
    That was a positing to show how to use LaTeX code.
    It was not intended as a problem to be worked.
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  5. #5
    MHF Contributor FernandoRevilla's Avatar
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    Re: Sum with limits

    Quote Originally Posted by Plato View Post
    That was a positing to show how to use LaTeX code.
    It was not intended as a problem to be worked.
    I'm sure that Also sprach Zarathustra knew it, and his answer was to show some sense of humor (good or bad, but at any case, sense of humor).
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  6. #6
    MHF Contributor Also sprach Zarathustra's Avatar
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    Re: Sum with limits

    Quote Originally Posted by FernandoRevilla View Post
    I'm sure that Also sprach Zarathustra knew it, and his answer was to show some sense of humor (good or bad, but at any case, sense of humor).
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  7. #7
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    Re: Sum with limits

    I don't think you need the \limits for your sum. e.g.

    \sum_{i=1}^{\infty} \frac{1}{2^i} = 1 yields
    \sum_{i=1}^{\infty} \frac{1}{2^i}= 1
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