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“规律分析”问题是2005年各地中考的热点试题,为了增强学生对此类问题的解答能力,特从2005年各地中考试题中撷取几例分类解析如下:例1(2005年北京市海淀区中考题)用“(?)”、“(?)”定义新运算:对于任意实数a、b,都有a(?)b=a和a(?)b=b.例如,3(?)2=3、3(?)2=2,则(2006(?)2005)(?)(2004(?)2003)=__。分析:定义新运算,只有找出“(?)”、“(?)”代表的含义才能解决此题.通过观察可知。a(?)b
The “law analysis” problem is a hot topic test for local high school entrance examinations in 2005. In order to enhance students’ ability to answer questions of this type, a few examples from various local middle school examination questions in 2005 were analyzed as follows: Example 1 (2005 Haidian District, Beijing, China) In the exam questions, use “(?)” and “(?)” to define new operations: For any real numbers a, b, there are a(?)b=a and a(?)b=b. For example, 3(?) 2=3, 3(?)2=2, then (2006(?)2005)(?)(2004(?)2003)=__. Analysis: To define a new operation, only by finding out the meaning of “(?)” and “(?)” can we solve this problem. We can see through observation. a(?)b