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What is (a-sub-n)x^n ?

any constant

haven't mastered entering equations here yet haha

\[a_{n}\]

and I need to find\[f(x)+g(x)=\sum_{n=0}^{\infty}a _{n}\left( x-1 \right)^{n}\]

Sorry not sure try physicsforums.com

ok thanks skaematik

This UI is rather annoying, sorry for the way my question is stated above.

cinar, I thought something similar, but I have to force the solution to have the lower limit n=0

\[-1+\sum_{n=0}^{\infty}\frac{ 2^{n+1} }{ (n+1)! }\frac{(n+1)^{2} }{ 2^{n+1} }(x-1)^n\]

\[-1+\sum_{n=0}^{\infty}a_n(x-1)^n\]

but it is not what you looking for right..

\[-2+\sum_{n=0}^{\infty}\frac{ 2^{n+1} }{ (n+1)! }+\frac{(n+1)^{2} }{ 2^{n+1} }(x-1)^n\]

here's what they got:

glad to hear that..

yeah I see now where I made a mistake..

oh? btw i'm looking at your problem...no ideas for it yet tho

thanks (:

I though it should be related integration by part somehow but no clue yet..