If \( S_{n} \) denotes the sum of \( n \) terms of an arithmetic progression, then the value of ... VIDEO
If \( S_{n} \) denotes the sum of \( n \) terms of an arithmetic progression, then the value of \( \left(S_{2 n}-S_{n}\right) \) is equal to
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(a) 4
(b) \( \frac{17}{4} \)
(c) ...