在旧教材中 ,定比分点公式 x =x1+λx21 +λ ,y =y1+λy21 +λ ,主要用来求分点的坐标 ,正因为它的局限性 ,其应用很少出现在解答题中 .而新教材将其放于“平面向量”部分 ,借助于向量运算和向量运算中的向量式和坐标式两套运算工具 ,为其在解析几何中的应用注入了活力 ,拓展了 In the old textbook, the fixed point formula x = x1 + λx21 + λ, y = y1 + λy21 + λ, is mainly used to find the coordinates of the points, because of its limitations, its application is rarely seen in the solution The new textbook puts it in the “planar vector” part. With the aid of vector and coordinate arithmetic in vector operations and vector operations, it injects vitality into its application in analytical geometry.