韦达定理是初中要求的基础知识,到了高中,它的作用日趋明显.在解析几何的解答题中,有着不可或缺的地位.对于直接运用韦达定理的运算,学生已经非常熟练,但在有些问题的求解中,会遇到两根不对称的情形.此时,“找关系”、“用性质”就显得很有必要了.一、例题展示 The Weddah Theorem is the basic knowledge required by the junior high school, and it has become increasingly obvious in high school. It has an indispensable position in solving problems of analytical geometry. For students who have directly used the Weida theorem, the students are very skilled but they are In the solution of some problems, we will encounter two asymmetric situations. At this time, “find relations” and “use nature” are very necessary.