Σ summation increments
 

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!

[QUOTE=roger;131803]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![/QUOTE]


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

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

[QUOTE=R.D. Silverman;131807][tex]\sum_{n=1}^{\infty} \frac{1}{(2n-1)}[/tex] would be over all odd numbers

replace (2n-1) for even numbers with just (2n)[/QUOTE]

(threw in tex tags)