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在教学与生产实际中,常常要作某些曲线的切线,而这些曲线多半都能用初等函数来表示。我们把能用初等函数表示的平面曲线称为初等曲线。本文介绍怎样作某些常用的初等曲线切线的一种简便方法。
In teaching and production practice, tangents to certain curves are often made, and most of these curves can be represented by elementary functions. We call the plane curve that can be expressed by elementary functions as elementary curves. This article describes how to make some of the commonly used elementary curve tangent a simple method.