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数学思想方法是数学基础知识的重要组成部分,是数学的精髓.合理地应用数学思想方法,通常可使问题轻松获解.下面就跟着杨老师看一看吧.一、方程思想利用平方根的性质、算术平方根的非负性和非负数的性质,通过列方程(组)来解决问题.例1(2016年自贡改编)若(a-1)~(1/2)+(b-2)~2=0,则ab的值等于().A.-2 B.0 C.1 D.2分析:根据“几个非负数的和为零,则其中每个非负数均为零”可得a,b的值,进而求解即可.
Mathematical thinking and method is an important part of mathematics basic knowledge, is the essence of mathematics. Reasonable application of mathematics and thought methods, usually can make the problem easily solved. The following is a look at teacher Yang. First, the use of the square root of the equation of thought The non-negative and non-negative nature of the arithmetic square root is solved by the equations (groups). Example 1 (Zigong, 2016) If (a-1)~(1/2)+(b-2)~ 2 = 0, the value of ab is equal to (). A.-2 B.0 C.1 D.2 analysis: According to the sum of several non-negative numbers, each non-negative number is zero. The value of a, b can be obtained and then solved.