Find the sum of the following series.
SUM (n=1 to inf) -3^(n-1)/(8^n)
Possibly fit into ar^n format?
3. The Attempt at a Solution [/b
I feel there is a way that this fits into a geometric form in which case could use a/(1-r) to find the infinite sum. I'm having trouble manipulating to fit into ar^n format when there are a couple powers of n in the general form.
Can the scalar 'a' value have an exponent in it? I guess not then it would be an exponential not a scalar