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第13章 隐藏的学霸(1 / 2)

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下午六点,周哲和张杰在学校附近吃了个快餐才回到家学校,倒不是学校的饭菜不好吃,毕竟一种作为县里唯一的中点中学,无论是饮食还是教学设施都是很好,但再好吃的饭菜,你连吃三年试试?

所以才有许多人说出了那句虎狼之词:野花不一定更美,但绝对新鲜!

此时的三班里,学生陆陆续续的坐到了自己的座位,离6.30晚自习还有15分钟,沉浸在放假欢乐的同学们连最后的时间也不愿意放过。

也许只有等晚自习铃声响起,才算放假正式结束吧!

周哲回到座位,同桌班长张晓倩早已规规矩矩的坐在了位置上刷着三年高考五年模拟。

但张晓倩显然陷入了困难之中,只见张晓倩俏脸严肃,清秀的眸子专注异常,洁白无瑕的眉心拧巴在了一起。

熟悉张晓倩的人肯定能看出,这是张晓倩陷入沉思的状态和表情。

周哲小心翼翼的探出头,看了一眼张晓倩正在解的题目,题目是这样的:

设整数n≥3,集合P={1,2,3,…,n},A,B是P的两个非空子集,记a,为所有满足A中的最大数小于B中的最小数的集合对(A,B)的个数.

(1)求a3;(2)求an。

这个数学题目周哲有些印象,是一道曾经的高考试题,在前世复读的时候,周哲也做过多次,彼时的周哲也是对这道题无从下手,但后来真的做懂了之后,这个题目其实很简单。

“a3的答案是5,第一问比较简单,难住你的应该是第二问吧?”

沉思中的张晓倩被一道声音打断,抬头望去却见是同桌周哲,那个吊儿郎当不思进取的班级吊车尾。

听到周哲话,张晓倩很是诧异:“你会做这道题?”

周哲自信的笑了:“应该可以解出来!”

张晓倩很是不信,作为班长,张晓倩的成绩无疑是班级拔尖的,但她都没有解题思路的题,周哲能做到?

这可比母猪会上树还让人难以相信。

察觉张晓倩质疑的目光,周哲笑着没有解释,而是从张晓倩手上拿过她的笔,以及桌上的草稿纸开始写了起来,笔上有些温热潮湿,想来是张晓倩紧张之下握笔用力流出的汗,周哲也不介意。

周哲不介意,张晓倩介意啊!作为学霸加校花,她是有些洁癖的,不太习惯别人动自己用过的东西,而且这个人还是周哲这个学渣,这是要教自己做题?

张晓倩虽然有些不信,也有些不满周哲的唐突,却也不是太生气,对于她而言,周哲除了学习成绩不好,脾气差以外,其他方面还是不错的。

尤其是每次班里有什么体力活,周哲都是第一个上的,而且周哲虽然家里条件不行,但好在有一副英俊的皮囊,加上经常打球,身材也是极好,可以说是一个英俊帅气的学渣。

虽然张晓倩算是个书呆子,为人也很清冷,但看到帅气的周哲,如果周哲不发脾气的情况下,张晓倩还是不讨厌的。

这也是班里抽签换座位的时候,抽到周哲的张晓倩没有要求换座的原因,她不讨厌周哲……

“唰唰唰!”周哲很快写出了第一小问的解题过程以及答案,张晓倩是看过模拟题最终答案的,知道周哲是正确的。

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