If the term of A.P is 2 and the common differences is 3, find the sum of the(a) the first term. (b) first twelve terms

Answer 1

"If the term of A.P is 2" makes no sense.
So, let's say the nth term is 2.
Then
a+(n-1)*3 = 2
a + 3n-3 = 2
a = 5-3n

Now you can write as many terms as you wish, knowing a and d.
and S12 = 12/2 (2a + 11d)