Question

If the sum of the first n terms of an A.P is given by sn=3n (n+1),find thd first term of the A.P

Answer 1

Answer:6

Step-by-step explanation:

Given, sum of n terms =3n(n+1)

i.e Sn=3n(n+1)

therefore, S1=3x1(1+1)

=6

i.e first term of the A.P=6 because sum of the first term is equal to the first term.

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