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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Originally Posted by Shizaru

How do you tex a sum with limits, i.e. sum from n=1 to infinity, or something like this

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[TEX]\sum\limits_{k = 2}^\infty {\frac{{\left( { - 1} \right)^k }}{{2^{k + 1} }}} [/TEX] gives

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Originally Posted by Plato

[TEX]\sum\limits_{k = 2}^\infty {\frac{{\left( { - 1} \right)^k }}{{2^{k + 1} }}} [/TEX] gives

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1/12

Quote:

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Originally Posted by Also sprach Zarathustra

1/12

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That was a positing to show how to use LaTeX code.
It was not intended as a problem to be worked.

Quote:

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Originally Posted by Plato

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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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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Originally Posted by FernandoRevilla

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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http://www.seventoons.com/images/pro...ove2-SPAIN.jpg

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

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