- #1

- 6

- 0

## Homework Statement

14

Ʃ 2(4/3)^n

n=1

## Homework Equations

Sn=a(1-r^n)/(1-r)

## The Attempt at a Solution

2(1-[4^14]/[3^14])/(-1/3)=330.74

However, the answer sheet gives ~441 as the answer, and I confirmed it by doing it by hand. Why is the equation not working? What's wrong?

Last edited: