Can somebody teach me how to solve this question? Please…

Sorry... since i don't know how to write the symbols here... so i used attachment...

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- Oct 4th 2012, 03:41 AMAuXianSeries and sequences
Can somebody teach me how to solve this question? Please…

Sorry... since i don't know how to write the symbols here... so i used attachment... - Oct 4th 2012, 04:06 AMemakarovRe: Series and sequences
- Oct 4th 2012, 04:25 AMjohnsomeoneRe: Series and sequences
If it's , then it isn't even true.

LHS . RHS .

: LHS . RHS . - Oct 4th 2012, 07:13 AMAuXianRe: Series and sequences
- Oct 4th 2012, 08:42 AMemakarovRe: Series and sequences
- Oct 4th 2012, 09:09 AMAuXianRe: Series and sequences
- Oct 4th 2012, 09:15 AMemakarovRe: Series and sequences
And yet you had to add the phrase "only the final step will convert r to n," the meaning of which I don't understand. Even worse, the left-hand side of the equation in the quote in post #2 does not depend on n (n is a bound variable used as the summation index) while the right hand side does. And if n and r are reversed, then, as post #3 shows, the equation is incorrect.