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in Algebra by (53.5k points)
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If the sum to n terms of an A.P is cn(n–1); c ≠ 0, then the sum of squares of these terms is

(a) c2n2 (n + 1)2

(b) \(\frac{2c^2}3\) n(n – 1)(2n – 1)

(c)  \(\frac{2c^2}3\) n(n + 1)(2n + 1)

(d) None of these

1 Answer

+1 vote
by (53.3k points)
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Best answer

Correct option is (b) \(\frac{2c^2}3\) n(n – 1)(2n – 1) 

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