在数学中有许多叙述看似简单,但学生却容易混淆且不易区别的问题.如在某条件下使不等式恒成立与在某条件下存在x0使不等式成立问题,这些问题也是函数考试中常见的两类问题,由于其形同质别,解题中许多同学常常由于审题不清或对问题理解不当,把其混为一谈,造成不该有的失误.先看 There are many problems in mathematics that seem simple but are confusing and difficult to be distinguished by students, such as the inequality being established under some conditions and the existence of x0 under certain conditions, which make the inequality problems common in function tests Two types of problems, because of their similarities and differences, many students in the problem-solving are often confused or misunderstood the problems, to confuse them, resulting in errors that should not be.