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ECAT - Practice Test - Maths - Sequences and Series Quiz

Attempt 10 MCQs on ECAT - Practice Test - Maths - Sequences and Series | Quiz 6

51. If the sum of the first n terms of an AP is given by 3n^2 + 2n, find the nth term.



52. The sum to infinity of a GP is 4 and the sum of its first two terms is 3. What is the (positive) common ratio?



53. The sum of an infinite GP is 3, and the sum of the squares of its terms is also 3. What is the third term of the GP?



54. If three numbers a, b, c are in both AP and GP, then which is true?



55. If the infinite geometric series 1 + r + r^2 + ... converges to 3, what is the sum of the series 1 + 2r + 2r^2 + 2r^3 + ...?



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