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1.小题大做——让思维飞得更高案例1单元考试结束,试卷讲评之前,将错题分类,全班分组,先由每组负责一类题目,了解错误原因,找出错误根源,尽可能多地找到解决的办法,再在全班汇报总结,提炼方法.其中一小组就某一题向我求助题目:已知两个反比例函数y=kx(k>1)和y=kx在第一象限内的图象如图1所示,点P在y=kx的图象上,PC⊥x轴于点C,交y=1x的图象于点A,PD⊥y轴于点D,交y=1x的图象于点B,当点P在y=kx的图象上运动时,以下结论:
1. Overkill - let the thinking fly higher. Case 1 The end of the test, the paper before the evaluation, the classification of the wrong questions, the entire class, each group responsible for a class of topics, understand the causes of the error, identify the root causes of the error, as far as possible Many ways to find a solution, and then in the whole class report summaries, refining methods. One of the group asked me for a question title: Known two inverse proportional functions y = kx (k> 1) and y = kx in the first The image in the quadrant is shown in Fig. 1. The point P is on the image of y=kx, the PC is on the x axis at point C, the image of y=1x is on point A, and the PD y axis is at point D. The image of y=1x is at point B. When point P moves on the image of y=kx, the following conclusions are drawn: