Home > APCALC > Chapter 9 > Lesson 9.1.1 > Problem 9-15
9-15.
Ying has a different method for summing an infinite series. Here are her steps:
1) Let
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
. 4) Substitute
for the other factor. 5) Solve for
.
Apply Ying’s method to the following problem. The first three steps are done for you. Copy them, then complete the solution.
Problem:
Start of Solution: