Chapter 9.1, Problem 90E

To determine

(a)

To find:

The third partial sum of the given series ${\displaystyle \sum _{i=1}^{\infty }2{\left(\frac{1}{3}\right)}^i}$.

To determine

(b)

To find:

The fourth partial sum of the given series ${\displaystyle \sum _{i=1}^{\infty }2{\left(\frac{1}{3}\right)}^i}$.

To determine

(c)

To find:

The fifth partial sum of the given series ${\displaystyle \sum _{i=1}^{\infty }2{\left(\frac{1}{3}\right)}^i}$.