Question 20
ProgressionsFind the sum to infinity of the series ½, 1/6, 1/18, ...
- A.1
- B.¾
- C.2/3
- D.1/3
Show the answer and explanation
Answer: B (¾)
Explanation
a = ½ and r = 1/3, so S = a/(1 − r) = ½ ÷ 2/3 = ¾.
Find the sum to infinity of the series ½, 1/6, 1/18, ...
Answer: B (¾)
a = ½ and r = 1/3, so S = a/(1 − r) = ½ ÷ 2/3 = ¾.