Question

If the sum of n terms of an AP is 2n^2 5n then find 2nd term

Answer 1

Sum of n terms of A. P =2n²+5n .

So, First term = 2(1²)+5(1) = 2(1)+5(1) = 7 .

Sum of two terms = 2(2²)+5(2) = 8 + 10 = 18 .

So ,Second term = 18 - 7 = 11 .


Hope helped !