**Answer is 2 , 10 **

**Solution ::**

To find the first term

substitute n=1 in formula

\(S_1=1^2(1+1)=1(2)=2\)

To find the second term, substitute n = 2 in formula or equation

\(S_2=2^2(2+1)=4(3)=12\)

Now S_{2} is the sum of the first two terms.

the first term + the second term = 12

2 + the second term = 12

the second term = 12 - 2

the second term = 10

So, the first term = 2 and the second term = 10