Question

Use the formula to evaluate the infinite series riund to the nearest hundredth if necessary 9+3+1+

27

13.5

4.5

3

Answer 1

Sum to infinity = a1 / ( 1 - r) (This is a geometric series a1 = first term, r = common ratio)

Here r = 3/9 = 1/3 and a1 = 9

So the answer is 9 / (1 - 1/3) = 9 / 2/3 = 9 * 3/2 = 13.5 Answer