A) \[n-1\]
B) \[\frac{n({{a}_{1}}+{{a}_{2n}})}{\sqrt{{{a}_{1}}}+\sqrt{{{a}_{n+1}}}}\]
C) \[\frac{n-1}{\sqrt{{{a}_{1}}}+\sqrt{{{a}_{n+1}}}}\]
D) \[\frac{n+1}{\sqrt{{{a}_{1}}+{{a}_{n}}}}\]
E) None of these
Correct Answer: B
Solution :
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