- #1

Spark15243

- 3

- 0

## Homework Statement

Find the sum of the series.

Summation (n/2^n)

from n = 1 to inf

## Homework Equations

Summation (x^n) = 1/1-x

## The Attempt at a Solution

n/2^n

n*(1/2)^n

Not sure what this equals after this... I was thinking (1/1-0.5) but that is a guess.

There are other ones like this, i have no idea how to do them, so any help on how to start and/or finish them will be appreciated.