Thread: Σ summation increments View Single Post
2008-04-18, 01:48   #2
R.D. Silverman

"Bob Silverman"
Nov 2003
North of Boston

22·5·373 Posts

Quote:
 Originally Posted by roger How is a summation expressed when the increment from one value in an expression to another is greater than one? For example, if I wanted the summation of a seried with the increment of the variable values being two, would I have to write earlier in the expression: let [variable] = 2*x ? I don't know how to do TEX code, so here's a picture: Thanks!

\sum_{n=1}^{\infty} \frac{1}{(2n-1)} would be over all odd numbers

replace (2n-1) for even numbers with just (2n)