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JEE 2020 Mathematics : Sequence and Series

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Question 1

If the ratio of the sum of n terms of two AP’s is 2n : (n+1), then ratio of their 8th terms is-

Question 2

If 2 ·nP1, nP2, nP3, are three consecutive terms of an A.P. then they are-

Question 3

In the following two A.P.'s how many terms are identical? 2, 5, 8, 11.... to 60 terms; 3, 5, 7, .. 50 terms

Question 4

If the product of 1st and 5th term of A.P is 24; 3rd and 4th term is 28, find value of largest term among the first 5 terms. It is given that the 7th term of A.P. is 2.

Question 5

The 7th term of an A.P is 1/5 and 5th term is 1/7. Find sum of first 13 terms.

Question 6

Let a1, a2, ……. a30 be an A.P., and If a5 = 27 and S – 2T = 75, then a10 is equal to :

Question 7

If the length of sides of right angled triangle are in AP, then their ratio is

Question 8

Find the sum of the series
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Dec 22JEE & BITSAT