CA Foundation P3 Ā· Chapter 6 Ā· Question 5 of 9
The sum to infinity of the G.P. 12, 4, 4/3, ... is:
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: B) 18
Explanation
Here a = 12 and r = 1/3, with |r| < 1. Sā = a/(1 ā r) = 12/(2/3) = 18. Dividing by r instead of (1 ā r) gives 36.
More Sequence and Series - Arithmetic and Geometric Progressions MCQs
- Q7Three numbers in A.P. have sum 27 and product 504. The largest of the numbers is:
- Q8The arithmetic mean and geometric mean of two positive numbers are 25 and 15 respectively. The numbers are:
- Q9The sum of the first n terms of the series 0.7 + 0.77 + 0.777 + ... is:
- Q1The 15th term of the A.P. 7, 11, 15, 19, ... is:
- Q2The sum of the first 20 terms of the A.P. 3, 8, 13, ... is: