### Home > CALC > Chapter 10 > Lesson 10.2.1 > Problem 10-89

10-89.

Use the Ratio Test.

This is a geometric series. What is the value of *r*?

Use the Limit Comparison Test with 1/*n*^{4}.

10-89.

Use the Ratio Test.

This is a geometric series. What is the value of *r*?

Use the Limit Comparison Test with 1/*n*^{4}.