Question

Find the sum of the infinite geometric series 8 + 4 + 2 + 1 +…if it exists.

17
15
18
16

Answer 1

16 because you use the equation S = a/1-r. In this case a = 8 and r is the ratio between the numbers which is (1/2). So plug in your a and r and you should get 16

Answer 2

Find the sum of the following infinite geometric series, if it exists.
2 + 1.5 + 1.125 + 0.8437 +…