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单词 ratio test
释义

ratio test

A test for convergence or divergence of an infinite series inline, due to D'Alembert. If the ratio inline then when k<1 the series converges absolutely, and for k>1 the series diverges. If k = 1, the ratio test is not sufficient to determine whether it converges. For example, k = 1 for both the series inline and inline, but the first series diverges whereas the second converges.

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更新时间:2025/4/29 8:09:36