含参数的零点问题是高考的一个热门考点,而数形结合是解决这类问题的有效方法.一般思路是将原函数分解成两个函数放在等号的两边,一边含有参数,视为动态图像;一边不含参数,视为静态曲线,然后通过动态图像的变化找两个图像的交点.在实际操作时,若能运用旋转化平移,动静相转化,多个图像相结合等方法,就能化繁为简,使得问题迎刃而 The zero problem with parameters is a popular test center for college entrance examination, and the combination of number and shape is an effective way to solve this type of problem. The general idea is to split the original function into two functions on both sides of the equal sign. Image; One side does not contain parameters, as a static curve, and then through the dynamic image changes to find the intersection of the two images. In actual operation, if you can use the rotation translation, dynamic and static phase transformation, a combination of multiple images, etc. It can simplify and simplify the problem.