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Old 2008-04-18, 00:19   #1
roger
 
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Oct 2006

22·5·13 Posts
Default 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!
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