含有参数的不等式的恒成立问题是不等式中的重要题型,也是各类考试的热点,该类问题通常可化为最值问题来解决。但由于这类问题既含参数又含变量,学生在处理时普遍感到难以驾驭,不是方法繁琐,就是思路不清。本文通过不等式恒成立中几个应注意问题的举例说明,帮助学生理清这类问题的解决思路,并避免一些易犯错误。 The constancy problem of inequality with parameters is an important problem in inequality and also a hot spot for all kinds of examinations. Such problems can usually be solved as the most value problems. However, since these types of questions contain both parameters and variables, students generally find it hard to control when dealing with them, either because the method is cumbersome or the thinking is unclear. In this paper, we give some examples that should be paid attention to when establishing inequality, help students sort out the solutions of such problems, and avoid some mistakes.