Question

If sum of n terms of AP is given by Sn=3n2 +n write the first 3 terms of an AP

Answer 1

Answer:

sn=3n^2+n

n=1

s 1 = 3xl+1=4

s2 = 3x2^2+2=14

s3=3x3^2+3=30

Ist term=4

2nd...=14-4=10

3rd term=30-14=16

4, l0,16........is the terms. Ans