Hey,

I am having trouble with the following proof.

If Pj = ∑ Qj (limits i = j+1 to ∞), then how do you prove that : ∑ Pj (limits 0 to ∞) = ∑ j*Qj (limits j+1 to ∞)

Cheers.

Printable View

- Mar 2nd 2013, 06:03 PMbankerHelp with Summations
Hey,

I am having trouble with the following proof.

If Pj = ∑ Qj (limits i = j+1 to ∞), then how do you prove that : ∑ Pj (limits 0 to ∞) = ∑ j*Qj (limits j+1 to ∞)

Cheers. - Mar 2nd 2013, 09:32 PMMacstersUndeadRe: Help with Summations
If

, then

If you can show then you are done (since there are j terms in the sum). Otherwise I'm stumped. - Mar 3rd 2013, 07:24 AMbankerRe: Help with Summations
Cheers man, managed to do it. Same logic but a different intermediary step!

- Mar 3rd 2013, 10:23 AMMacstersUndeadRe: Help with Summations
I'm curious to what the different intermediary step is.