一般地,求解最值问题总是分两步曲:先建立目标函数,后求最值,思路清晰,目标明确,但美中不足的是建立目标函数后便把目标固定在一边,使求最值的方法相对呆板.对于一些具体的问题如让目标加入运算,常常能化难为易,化繁为简.例1 求经过点 A(-2,2)且在第二象限与两个坐 In general, the problem of solving the most value is always divided into two steps: first establish the objective function, after the most value, clear thinking, clear goals, but the fly in the ointment is to set the objective function fixed aside, so that the best value The method is relatively inflexible. For some specific problems, such as letting the target join the operation, it is often difficult to make things easier and it is more complicated. Example 1 Find the point A(-2,2) and sit in the second quadrant and the two