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Answer : 2 -2 Explanation : Answer: B) -2 Explanation: We know that in A.P series18th term = a 17d29th term = a 28dBut given a 17d = 29..........(i)a 28d = 18......... (ii)Solving equation (i) and (ii), we getd = -1put d = -1 in any of the above equations and we get, a = 46Now, we know 49th term can be written as, a 48d putting the value of a and d in the above equation,a 48d = 46 48(-1) = 46 - 48 = -2Hence, the 49th term is -2.

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