在研究各种中考复习资料和各地中考试题的过程中,往往会遇到一些难题.为解决这些问题,我们必须做到“站得高一点,视野宽一点,研究深一点,准备足一点.”事实上,数学题的难易是相对的,当找不到解题思路,或者只按照常规思路来思考,可能会感觉“山重水复疑无路”的困惑.而一但找对了思路,或换一个视角来思考,就会获得“柳暗花明又一村”的愉悦.下面以实例来说明怎样变换角度看问题的本质,使难题顺利获解.一、用函数的视角看方程的解 In the process of examining various kinds of secondary school exam materials and exam questions in different areas, we often encounter some problems. To solve these problems, we must achieve a higher level of vision, a wider field of vision, a deeper study and a little preparation. In fact, the difficulty of math problems is relative, when you can not find the problem-solving ideas, or just think in accordance with the conventional thinking, you may feel confused. On the line of thinking, or from a different perspective, you will get The following examples to illustrate how to change the perspective of the nature of the problem, the problem was successfully solved. Look at the solution of the equation