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学习数学离不开解题,而解好一道数学题,需要有扎实的基础知识,灵活的思维方法,清晰的思维过程.加强题组教学是巩固基础知识,培养学生良好思维品质,提高解题能力的有效方法之一.下面举例说明.例1过点P(1,2)作直线l,与坐标轴围成的面积为21,求此直线l的方程.解设l的方程为ax+by=1
Learning mathematics is inseparable from solving problems, and solve a math problem, you need to have a solid foundation of knowledge, flexible thinking, a clear process of thinking .To strengthen the teaching group is to consolidate the basic knowledge, foster students’ good thinking quality, improve the problem-solving The following example illustrates an example 1. Example 1 over point P (1,2) as a straight line l, with the coordinate axis area of 21, find the equation of this straight line l solution l set the equation ax + by = 1