最近笔者在研究向量时,发现利用共线向量中的系数求共面向量→AP=→m AB+→n AC中的系数,能收到事半功倍的效果.具体思路是:先找到一个与向量→AP共线的向量→AM,令→AP=λ→AM,且向量→AM比较容易用基底→AB、→AC表示,再根据已 Recently, when I studied the vectors, I found that using the coefficients in the collinear vector to find the coefficients in the coplanar vector → AP = → m AB + → n AC can get a multiplier effect. The specific idea is: First find a vector → AP Collinear vector → AM, so that → AP = λ → AM, and vector → AM relatively easy to use base → AB, → AC said, according to