零和正数统称为非负数．如实数的绝对值是非负数，实数的偶次幂是非负数，算术根是非负数．非负数具有下列性质：1．若干个非负数的和仍为非负数，这就是说，若2如果若干个非负数的和为零，那么各个非负数均为零，这就是说，若非负数的性质在数学解题中有广泛的应用，下面举例? Zero and positive numbers are collectively referred to as non-negative numbers. If the absolute value of a real number is a non-negative number, the even power of a real number is a non-negative number, and the arithmetic root is a non-negative number. Non-negative numbers have the following properties: 1. The sum of several non-negative numbers is still non-negative, which means that if 2 is a sum of several non-negative numbers, then each non-negative number is zero, that is to say, if the nature of non-negative numbers is extensive in mathematical problems Application, the following example?