### Home > APCALC > Chapter 9 > Lesson 9.1.2 > Problem 9-31

9-31.

An **alternating** **series**, such as

What is the common ratio for 100 – 80 + 64 – 51.2 + …?

Calculate the sum of this infinite series.

9-31.

An **alternating** **series**, such as

What is the common ratio for 100 – 80 + 64 – 51.2 + …?

Calculate the sum of this infinite series.