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

If the sum of n terms of an A.P. is `n P +1/2n(n-1)Q ,`where P and Q are constants, find the common difference.

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To solve the problem, we need to find the common difference \( d \) of the arithmetic progression (A.P.) given that the sum of the first \( n \) terms is expressed as: \[ S_n = nP + \frac{1}{2}n(n-1)Q \] where \( P \) and \( Q \) are constants. ...
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