本文介绍了如何利用无穷小等价代换求未定式的极限，使计算简单化。
This paper introduces how to make use of the replacement of same value infinitesimal in calculating limit of the undecided type.
本文介绍了如何利用无穷小等价代换求未定式的极限，使计算简单化。
This paper introduces how to make use of the replacement of same value infinitesimal in calculating limit of the undecided type.
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