### Home > CALC > Chapter 9 > Lesson 9.1.1 > Problem9-15

9-15.
1. Ying has a different method for summing an infinite series. Here are her steps: Homework Help ✎

1. Let S = the sum.

2. Separate the first term from the rest of the series.

3. Factor the rest of the terms so that the remaining factor is S .

4. Substitute S for the other factor.

5. Solve for S.

Apply Ying's method to find S in the following problem. The first three steps are done for you. Copy them first, then complete the solution.