数学试题讲解

1.(1)

lim_{m \to \infty} \sum_{i = 1}^{m} \sum_{j = 1}^{n} \frac{n}{(m + i) (n^{2} + j^{2})} = \underset{―}{}

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(2)

lim_{n \to \infty} \sum_{i = 1}^{n} \sum_{j = 1}^{n} \frac{i}{n^{3}} \sin^{2} \frac{2 π j}{n} = \underset{―}{}