## anonymous one year ago help

1. anonymous

2. rishavraj

sum of infinite series when $-1 < r < 1$ is $\frac{ a_1 }{ 1 - r }$

3. mathstudent55

Use the formula we used in the last problem which rishavraj has written above. The first term is right there. Find r, the common ratio, by dividing a term by its previous term.