### Home > INT3 > Chapter 12 > Lesson 12.2.1 > Problem12-82

12-82.

What is the sum (if possible) for each of the following infinite series?

1. $8-6+\frac{9}{2}-\frac{27}{8}+...$

$r=\frac{-6}{8}$

$s=\frac{a}{1-r}$

1. $\quad \displaystyle\sum _ { k = 0 } ^ { \infty } \frac { 1 } { 8 } ( 2 ) ^ { k }$

$r = 2$
so not possible.