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[T(n)quad a+(n-1)dquad a+(n-1)2aquad 2n-...

[T_(n)quad a+(n-1)dquad a+(n-1)2aquad 2n-1],[" (AMPLE 29"" If there are "(2n+1)" terms in A.P.then prove that the ratio of the sum of odd terms and "],[" te sum of even terms is "(n+1):n" ."]

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