### Home > CALC > Chapter 12 > Lesson 12.1.1 > Problem 12-7

12-7.

You should recognize the argument of the summation as representing a special value.

This is an alternating series. What is:

Use l'Hôpital's Rule.

Compare this series to:

This is the same as the series below. Which is dominant when *k* > 5, the numerator or the denominator?