题库搜索>问题求解PS-13387
If N is positive, which of the following is equal to
1√n+1−√n
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
我有更好的解析 
暂无雷哥网文字解析
因为1/(a-b)=(a+b)/(a^2-b^2)
所以原公式为<(n+1)^1/2+n^1/2>/<(n+1)-n>=E选项
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