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If the sum of n terms of an A.P is cn (n...

If the sum of n terms of an A.P is cn (n-1)where `c ne 0` then the sum of the squares of these terms is

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If the sum of n terms of an A.P is cn (n-1) where c ne 0 then find the sum of the squares of these terms.

If the sum of first n terms of an A.P. is cn^(2) then the sum of squares of these n terms is

If the sum of n terms of an A.P. is 2n^(2)+5n , then its n^(th) term

If the sum of n terms of an A.P. is 2n^2+3n then write its nth term.

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If the sum of m terms of an A.P. is same as the sum of its n terms, then the sum of its (m+n) terms is

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If the sum of m terms of an A.P. is equal to the sum of either the next n terms or the next p terms, then prove that (m+n)(1/m-1/p)=(m+p)(1/m-1/n)dot

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