数学命题分题设和题断两个部分。在一些命题的题设中,有时不明确地点明已知条件是什么,或在明确的条件中还可能隐去一两个条件,这种隐蔽在题设中的已知条件谓之“隐含条件”。解答这类问题的关键,往往就在于能不能正确地发掘和利用”隐含条件”。教师应从以下几个方面加强对学生的引导。一、隐含在函数的定义域和值域中的条件 Mathematical propositions set the subject and the question of two parts. In the propositions of some propositions, sometimes it is unclear what is the known condition or one or two conditions may be hidden in a definite condition. This known condition hidden in the title implies “implied condition”. The key to solving this type of problem often lies in whether the “implied conditions” can be correctly explored and utilized. Teachers should strengthen the guidance of students in the following aspects. First, the conditions implied in the function's domain and range