1.

If in an A.P., Sn = n2p and Sm = m2p, where Sr denotes the sum of r terms of the A.P., then Sp is equal to :A. \(\frac{1}{2}\)p3B. mn p C. p3D. (m+n)p2

Answer»

Option : (C)

Here, 

Sn = n2

Now, 

Substituting n = p we get 

Sp = p2

= p3



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