# Math Help - summation problem.

1. ## summation problem.

Every time I try to write a sum or prod. in latex I get something like this: http://data.artofproblemsolving.com/...c0e633e009.png

any help on how to make the notation correct?

2. What's wrong with what you've posted?

3. Originally Posted by integral
Every time I try to write a sum or prod. in latex I get something like this: http://data.artofproblemsolving.com/...c0e633e009.png

any help on how to make the notation correct?
If this is in a LaTeX document try $$..$$ as the mathmode delimiters (makes what is enclosed a display equation), if on MHF (and in a LaTeX document for that mater) start the math string:

$$\displaystyle ...$$

CB

4. Thanks Cb, it worked.