学习数学,必须要做适量的题目.面对千“题”百怪的数学题,我们也要随机应变,转换视角和思路,见什么样的题目就应做什么样的策划.1暗题明做含蓄是一种美,许多数学题目在设计时也会布下“暗线”,追求一种“犹抱琵琶半遮面”的含蓄美.例1已知a=(1,2),b=(3,2),且|(ka+b)-(a-3b)|=|k To study mathematics, we must do the right amount of questions. In the face of thousands of “question” puzzles, we must also adapt randomly, change perspectives and ideas, and see what kinds of topics should be planned.1. Implicity is a kind of beauty, and many mathematics topics are designed to lay down the “dark line” and to pursue an implicit beauty that “still holds and covers half.” Example 1 Known a=(1,2), b=(3 , 2), and |(ka+b)-(a-3b)|=|k