在平面几何中,有一类证明两线段的倒数和等于另一条线段的倒数问题,这类问题往往使同学们感到棘手,无规律可循.下面就介绍一种行之有效的证法,供大家参考. In plane geometry, there is a type of problem that proves that the reciprocal of two line segments is equal to the reciprocal of another line segment. Such problems often make students feel intractable. There is no law to follow. Here is an effective proof method for everyone. reference.