Find the sum of first 51 terms of an AP whose second and third termsar – InterviewSolution

InterviewSolution

1.	Find the sum of first 51 terms of an AP whose second and third termsare 14 and 18 respectively.
Answer» Correct Answer - 5610 Let a be the first term of the given AP. Then, 14-a = 18-14 `rArr` 14-a = 4 `rArr` a = 10 `therefore ` a = 10,d = 4 and n = 51. Now, find `S_(n)`.

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