Question

The sum of the first terms of an AP is 28 and sum of the first eight terms of the same AP is 88. Sum of first 16 terms of AP is ​

Answer 1

Answer:

But this (19) also represents the average of the 16 term A.P. Hence, required answer = 16 × 19 = 304. This discussion on The sum of the first four terms of an AP is 28 and sum of the first eight terms of the same AP is 88.