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The sum of n terms of an ap is n squares.find its common difference. The sum of n terms of an ap is n squares.find its common difference.
(n/2)(a + l) = n^2a + l = 2nl = 2n – al = a + (n-1)d = 2n – ad = 2(n – a)/(n-1)where a would be the first term always.
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