用“代点法”解直线与曲线的相交弦问题西安冶金机械厂中学王玉杰解析几何中．曲线的方程和方程的曲线的定义，为设点、代点提供厂理论依据．当直线与曲线的相交弦的小点恰为坐标原点．或中点弦的斜率已知（或可用有关参数表示）．或相交弦经过定点时，则该相交弦的端点的... Using the “alternative point method” to solve the problem of the intersection of a straight line and a curved line Xi’an Metallurgical Machinery Factory Middle School Wang Yujie Analytic geometry. The definition of the curve equation and the equation curve provides the theoretical basis for setting the point and the generation point. When the intersection of a straight line and a curved line, the small point is exactly the coordinate origin. The slope of the mid-point chord is known (or can be represented by relevant parameters). Or intersecting strings passing through a fixed point, the end of the intersecting string...