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同学们都知道,有些代数题,在相同的条件下,往往有几个答案.例如若|x|=2,则 x=±2;x~2-5x+6=0则 x=3或2等.几何题在同一条件下也可能有几种不同的图形,从而出现几个可能的答案.解题时如稍不注意就可能产生漏解,必须引起注意.现举例谈谈与等腰三角形有关的两类问题.
The students all know that some algebra questions often have several answers under the same conditions. For example, if |x|=2, then x=±2; x~2-5x+6=0 means that x=3 or 2 Etc. Geometry problems may also have several different graphs under the same conditions, so that there are several possible answers. If you do not pay attention to the problem, you may have misunderstood and you must pay attention. Now for example talk about isosceles triangles. Two related issues.