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本文从另一个角度,利用割线逼近切线的思想,对解决直线与圆锥曲线相切的直线方程问题做了系统的讨论,得出了圆满的结论.
This article from another perspective, the use of secant approximation of the tangent of the idea, to solve the straight line and the tangent of the straight line equation problems systematically discussed, reached a satisfactory conclusion.