Mark the correct alternative in the following:
Let denote the sum of first n terms of an A.P. If , then is equal to

Here,S_2n=3S_n

Now,

∴ S_3n:S_n=6:1

Question

Mark the correct alternative in the following: Let denote the sum of first n terms of an A.P. If , then is equal to

Philoid · Accepted Answer

Here,S_2n=3S_n

Now,

∴ S_3n:S_n=6:1