二次函数作为初中数学的重点和难点内容,一直受中考命题人的青睐,而且常常出现在压轴题上,如果把最短距离再和二次函数综合起来,难度就更大了,解决这类问题的关键是:将问题转化为两点之间线段最短,这样解决起来就得心应手了. As a secondary school mathematics mathematics focus and difficult content, has been favored by the senior high school entrance examination subjects, and often appear in the finale of the question, if the shortest distance and quadratic function together, the more difficult to solve such problems The key is: The problem is converted into the shortest line between two points, so that it is handy to solve.