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2Â¥: Originally posted by hylpy at 2016-07-28 10:03:00
½â:ÓÉͨÏʽ£¬¿ÉµÃ:t_1=\frac{110a+90\times 15}{11a+15};
\therefore \lim_{a \to \infty  }t_1=\frac{110a+90\times 15}{11a+15}=10;
\Rightarrow \lim_{a \to \infty  }t_n=\frac{110a+90\times 15}{11a+15} ...

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