# Sum with limits

• Jan 9th 2012, 05:56 AM
Shizaru
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
• Jan 9th 2012, 06:23 AM
Plato
Re: Sum with limits
Quote:

Originally Posted by Shizaru
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
$\displaystyle \sum\limits_{k = 2}^\infty {\frac{{\left( { - 1} \right)^k }}{{2^{k + 1} }}}$
• Jan 9th 2012, 08:21 AM
Also sprach Zarathustra
Re: Sum with limits
Quote:

Originally Posted by Plato
[TEX]\sum\limits_{k = 2}^\infty {\frac{{\left( { - 1} \right)^k }}{{2^{k + 1} }}} [/TEX] gives
$\displaystyle \sum\limits_{k = 2}^\infty {\frac{{\left( { - 1} \right)^k }}{{2^{k + 1} }}}$

1/12
• Jan 9th 2012, 08:41 AM
Plato
Re: Sum with limits
Quote:

Originally Posted by Also sprach Zarathustra
1/12

That was a positing to show how to use LaTeX code.
It was not intended as a problem to be worked.
• Jan 9th 2012, 09:21 AM
FernandoRevilla
Re: Sum with limits
Quote:

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.

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).
• Jan 9th 2012, 09:52 AM
Also sprach Zarathustra
Re: Sum with limits
Quote:

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).

http://www.seventoons.com/images/pro...ove2-SPAIN.jpg
• Jun 14th 2012, 11:35 PM
richard1234
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
$\displaystyle \sum_{i=1}^{\infty} \frac{1}{2^i}= 1$