Thanks for the help. Mathman, that was what I was looking for for the first one.
Using your example, do you or anyone else know what the finite sum would be for i bi?
Hi Bill, you are right.
For #1, I am asking for a closed form equation for the sum of: 1/a^1 + 1/a^2 + 1/a^3 ... 1/a^n
For #2, I was asking for a closed form equation of the sum of: 1/a^1 + 2/a^2 + 3/a^3 ... n/a^n
For both, a is any constant (for my purposes a is (1+r) where r is...
Ignore the above, I was haveing problems with the symbol...
Convert each to closed form:
1. Sum from i=1 to n of: \frac{n}{a^n}
2. Sum from i=1 to n of: \frac{1}{a^n}
Thanks.
P.S. I know how to do it if it was an infinite series, but not for this.