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Existential Quantifier

If Sn=n P+n/2...

Question

If $S_{n} = n P + \frac{n}{2} (n - 1)$ Q, where $S_{n}$ denotes the sum of first n terms of an AP, the common difference is

A

P + Q

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B

2P + 3Q

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C

2Q

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D

Q

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Solution

The correct option is D Q
By definition d = Q

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