非负数性质的应用范围较广,利用它可解决求代数式值,求函数值、求参数取值范围、求证不等式及判断三角形形状等问题,所以我们应充分利用非负数或构造非负数的方法来解题,可提高解题速度,简化解题过程. Non-negative nature of a wide range of applications, the use of it can solve the algebraic value, seek the value of the function, seek the range of parameters, the inequality of proof and judge the triangle shape and other issues, so we should make full use of non-negative or non-negative methods to construct Solve the problem, can improve the speed of solving problems, simplify the process of solving problems.