历年高考中都会出现这样一类题:条件中给出学生未知的一个新概念或新运算,让学生运用这个新知识去解题.尽管这类题难度不是很大,但对学生的发展却很有意义·理由之一是这些新知识有些属于高等数学的范畴,通过这些“新题”可以开阔学生的视野,加强初等数学与高等数学的衔接和过 There will be such a problem in the college entrance examinations over the years that the condition gives a new concept or new operation unknown to the students, so that the students can use this new knowledge to solve the problem. Despite the difficulty of this type of problem is not great, but it is very development of the students. One of the reasons why it is meaningful is that some of these new knowledge belong to the category of higher mathematics. Through these “new questions,” you can broaden your horizons and strengthen the convergence between elementary mathematics and higher mathematics.