对于一道学生容易出错的试题,我们不仅要认真分析错误原因,更重要的是让学生把握问题的实质,多角度、多方位思考解决问题的办法,只有这样才能达到事半功倍的效果.下面结合一道求最值的问题加以说明.例设x0,y0,且1x+9y=1,求x+y的最小值.看到此题,许多同学会立刻想到均值定理, For a question that students are prone to making mistakes, we must not only carefully analyze the causes of the error, but more importantly, let students grasp the essence of the problem and think about solutions to problems in a multi-angle and multi-dimensional manner. Only in this way can we achieve a multiplier effect. The value of the problem to be explained. Examples set x0, y0, and 1x+9y = 1, find the minimum value of x + y. See this question, many students will immediately think of the mean value theorem,