Mark the correct alternative in the following:
If the sum of n terms of an A.P. be 3 and its common difference is 6, then its first term is

Here, S_n=3n²-n

Then, S₁=3(1²)-1

=2

So,first term is a₁=S₁=2

Question

Mark the correct alternative in the following: If the sum of n terms of an A.P. be 3 and its common difference is 6, then its first term is

Philoid · Accepted Answer

Here, S_n=3n²-n

Then, S₁=3(1²)-1

=2

So,first term is a₁=S₁=2