ChallengeMediumTelescoping & Recursion ShareTelescoping & Recursion · Medium problemCompute ∑n=1991 nn+1+(n+1)n \displaystyle \sum_{n=1}^{99}\frac{1}{\,n\sqrt{n+1}+(n+1)\sqrt{n}\,}n=1∑99nn+1+(n+1)n1.Express your answer as a common fraction.Check Show answer Walk through it step by step Practice more like this Review this concept