Question

find the first two terms of the sequence Sn =n² (n+1)​

Answer 1

Sn=n2(n+1)

S1=1^2(1+1)=1(2)=2

S2=2^2(2+1)=4(3)=12

S1=a1=2

a2=S2-S1=12-2=10

Thus

a1=2

a2=10