(sorry i dont know how to do the summation symbol) double summation, j=1 to 4 and k=2 to 8 (j*k) is there a specific formula you are supposed to use?
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Hello, Originally Posted by jlt1209 (sorry i dont know how to do the summation symbol) double summation, j=1 to 4 and k=2 to 8 (j*k) is there a specific formula you are supposed to use? In the second summation, since j doesn't depend on k, you can get it out from the sum : You can calculate the sum , by using this known formula : And then, you're left with only one sum, that should be easy to compute
Last edited by Moo; Apr 28th 2009 at 10:21 PM. Reason: typo thanks
Typo alert..... In the second summation, since j doesn't depend on k, you can get it out from the sum : or
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