Given that , find

n

∑Ur

r=1

I’ve done but I’m confused about my answer. Please tell me is it wrong or right.

I got

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- January 23rd 2008, 08:55 PMgetonConfusion in Series
Given that , find

n

∑Ur

r=1

I’ve done but I’m confused about my answer. Please tell me is it wrong or right.

I got - January 23rd 2008, 09:06 PMmr fantastic
- January 23rd 2008, 09:54 PMgeton
I’m really very sorry for my mistake.

- January 23rd 2008, 10:21 PMbadgerigarQuote:

\frac{1}{6} n(n + 1) (4n + 5) + 2^{(n + 3)} - 4