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第九十三章 人民币玩家(1 / 2)

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看向黑板上的题目,设ξ是函数f(x)=arcsinx在区间[0,b]上的一点,求极限limξb(b-0)。

看到这个题目时,宁飞就知道事情并不简单了。

学过数学的人都知道,题目越是简单,解题的难度就越大!

“我靠,ξ在[0,b]上,除了小于b,还有什么关系呢?”

宁飞虽然没听讲,但他高数还是不错的,求极限就那么几种方法,要是能够将ξ和b换成同一个变量,到时候就能用洛必达法则求出极限了。

关键就在于,ξ和b哪有什么联系啊?

他需要的是等式,ξ小于b有屁用啊!

一分钟过去了,黑板上三人都快晾成人肉干了,事实证明,上课不听讲,是肯定不会做题的,哪怕宁飞平时高数学得还不错。

当然,换成任何一个人一个多月没有上过课,大概也是不可能会的……

宁飞下意识的用求助的目光看向身旁的白芷。

“这位同学,来吧,上来做题!”

老师慧眼如炬,宁飞目光刚有所异动,她就猜到了宁飞的想法,直接将宁飞请上了黑板。

宁飞无奈,这个时候解释自己已经休学什么的,并没有什么意义……

站在讲台上,宁飞莫名感觉同学们对自己似乎有很大的敌意啊,这让他有些莫名其妙。

虽然已经一个多月没有上课了,但宁飞还是决定认真思考一下。

根据以往的经验,老师在课堂上出的题目很大概率就是本堂课讲过的内容,当然,因为老师某些不可告人的目的,这道题肯定不会那么简单。

不过解法应该是不会变的。

宁飞下意识看向双手抱着课本在心里画小圈圈的李建强同学,当然,宁飞并不认识这位同学,“同学,书你看完了吗?如果看完了,可以借我看看吗?”

李建强早就想扔掉这个烫手山芋了,现在既然宁飞想要,那他当然是满足宁飞了,求之不得的将书递给了宁飞。

“同学,请问老师今天讲的是哪一章的内容啊?”宁飞礼貌客气的问道。

他自己都没有发觉,经历过多次大型比赛洗礼的他即便是上了讲台也没有太多紧张,虽然不会这道题,但他在冷静的寻找解决办法,而不是像站在旁边的几位同学一样,因为紧张和窘迫而方寸大乱,不知所措。

李建强是一位热心的好同学,他不仅告诉宁飞老师讲了哪一章,甚至还给宁飞指出了具体是哪几节。

老师饶有兴趣的看着在讲台上从容不迫翻书的宁飞,这样的学生她倒还真是第一次见,别的学生若是遇到这样的事情,不是挂在黑板上茫然失措,就是焦躁的胡思乱想,很少能够真的认真翻书找答案的。

当了这么多年老师,认真看书和不认真看书,她还是能够分辨的。

也不知道是不是宁飞的表现让老师感兴趣了,她竟然并没有再点其他同学,而是耐心的等待着宁飞翻书。

就在宁飞翻书的时候,一位在草稿纸上飞快演算的学霸放下了笔,长吐一口气,环顾教室,颇有一种会当临绝顶,一览众山小的畅快感。

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