### Home > CALC > Chapter 10 > Lesson 10.1.2 > Problem 10-9

10-9.

For an infinite geometric series:

But *r* must be _____.

The series in part (a) is arithmetic.

The other series are geometric. What is the value of *r* in each case?

10-9.

For an infinite geometric series:

But *r* must be _____.

The series in part (a) is arithmetic.

The other series are geometric. What is the value of *r* in each case?