Question

Use the formula to evaluate the infinite series. Round to the nearest hundredth if necessary.

Answer 1

Explanation:

1.25

Answer 2

1.25.

Explanation:

The common ratio r is 1/5 and the first term a1 = (1/5)^(1-1) = 1.

Sum to infinity = a1 / (1 - r)

= 1 / (1 - 1/5)

= 1 / 4/5

= 5/4

= 1.25 (answer)