A study on the method of drawing conic normal lines through a given point outside the conic.
本文就过圆锥曲线外的点作其法线的方法进行研究。
Thus, we give a make-graph method of conic section on plane with arbitrary point as foci, arbitrary line as directrices and arbitrary positive number as eccentricity.
从而给出了以平面上任意点为焦点、任意直线为准线，任意正数为离心率的圆锥曲线的直接作图方法。
The value of solution for the linear equation at the conic point is derived, and the necessary condition satisfied by the Cauchy's problem solution is given.
考查了线性组合方程的解在特征角面顶点的值，并给出了柯西问题解对初值的必要条件。
The value of solution for the linear equation at the conic point is derived, and the necessary condition satisfied by the Cauchy's problem solution is given.
考查了线性组合方程的解在特征角面顶点的值，并给出了柯西问题解对初值的必要条件。
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