3.a.1 - 2016 Q1 Answers
1) A geometric series has first term a and common ratio r = 3/4
The sum of the first 4 terms of this series is 175
(a) Show that a = 64 (2)
(b) Find the sum to infinity of the series. (2)
(c) Find the difference between the 9th and 10th terms of the series. Give your answer to 3 decimal places. (3)
The sum of the first 4 terms of this series is 175
(a) Show that a = 64 (2)
(b) Find the sum to infinity of the series. (2)
(c) Find the difference between the 9th and 10th terms of the series. Give your answer to 3 decimal places. (3)