lim 當 t->0
根號(t^2 + 9) -3
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t^2
答案給0,但我算1/6
收錄日期: 2021-04-30 17:01:06
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120927000010KK05502