The ratio test and the root test are two widely used convergence tests for positive series.

比式判别法和根式判别法是对正项级数收敛性进行判别的两种广用的方法。

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The ratio test and the root test are two widely used convergence tests for positive series.

比式判别法和根式判别法是对正项级数收敛性进行判别的两种广用的方法。

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