A) \[\frac{{{n}^{2}}-1}{2}\]
B) \[\frac{{{n}^{2}}-1}{3}\]
C) \[\frac{{{n}^{2}}-1}{4}\]
D) \[\frac{{{n}^{2}}-1}{6}\]
E) None of these
Correct Answer: B
Solution :
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