- #1

- 27

- 0

## Homework Statement

Find the sum of the following series.

SUM (n=1 to inf) -3^(n-1)/(8^n)

## Homework Equations

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

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