Mark the correct alternative in the following:
If in an A.P. and , where denotes the sum r terms of the A.P., then equals

Here, S_n=n²q

Now, substituting n=q we get

S_q=q²p=q³

Question

Mark the correct alternative in the following: If in an A.P. and , where denotes the sum r terms of the A.P., then equals

Philoid · Accepted Answer

Here, S_n=n²q

Now, substituting n=q we get

S_q=q²p=q³