An AP consists of 37 terms. The sum of the three middle most terms is – InterviewSolution

1.

An AP consists of 37 terms. The sum of the three middle most terms is 225 and thesum of the last three terms is 429. Find the AP24.

Answer»

a+17d+a+18d+a+19d=2253a+54d=225a+18d=75…...1

a+34d+a+35d+a+36d=4293a+105d=429a+35d=143.....2

Subtract equation 1 from 217d=68d=4a=75-72=3

AP is 3,7,11,15...

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