posted by David .
The question is, if f(x) is equal to the series from n to infinity of a sub n times (x-7)^n for all n, find a formula for a sub 10. (I apologize for typing it out in the way that I did, but it was the only way I could.
I don't quite understand what is being asked here. I tried writing an equation where the series is equal to (a sub n)/(1-r), but that didn't seem to work. Could someone explain to me what I am supposed to do here?