在学习数学的过程中,会碰到一些不容易求解的方程(组).比如,高次方程、无理方程或绝对值方程(组)解的个数的判断问题,若用代数方法,解起来运算麻烦,且不易解决.如果运用数形结合的思想,借助于函数图象,则可以比较简捷、直观地判断方程(组)的个数以及近似解. In the process of learning mathematics, you will encounter some equations (groups) that are not easy to solve. For example, the problem of the number of solutions of higher order equations, irrational equations, or absolute value equations (groups) can be solved by using algebraic methods. The operation is troublesome and difficult to solve. If you use the idea of ​​combination of numbers and shapes, with the help of function images, you can determine the number of equations (groups) and approximate solutions intuitively and intuitively.