A) \[\frac{n\,(n+3)}{2\,(n+1)\,\,(n+2)}\]
B) \[\frac{n\,(n+1)\,\,(n+2)}{4\,(n+3)}\]
C) \[\frac{8}{n\,(n+1)\,\,(n+2)\,\,(n+3)}\]
D) \[\frac{2\,(n+1)\,\,(n+2)}{n\,(n+3)}\]
E) None of these
Correct Answer: A
Solution :
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