Question

Evaluate

\lim_{n\rightarrow \infty }\,\left [ \frac{n}{1+n^{2}}+\frac{n}{4+n^{2}}+\frac{n}{9+n^{2}}+\cdots+\frac{n}{2n^{2}} \right ].

04 Mar 2024
Answer :
Word Count : 241
To evaluate the limit \[ \lim_{n \to \infty} \left[ \frac{n}{1+n^2} + \frac{n}{4+n^2} + \frac{n}{9+n^2} + \cdots + \frac{n}{2n^2} \right], \] we can express the sum inside the limit more generally as: \[ S_n = \sum_{k=1}^{n} \frac{n}{k^2 + n^2}. \] We ___ _______ ____ _____ __________ ____ ___.
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