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第十章 梦,桂言叶(500加更)

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高中的课堂,千篇一律的教学内容,这一切都不免让柳梦潮心生厌倦。最新地址ltxsba.fun要不是自己眼前,隐形的系统面板,在不停的提示自己,彩池数额不断上升中。恐怕自己早就会睡着了吧。

谁说只有中国的老师,上课无聊?在某些方面,日本的教师,更是能够超出人类的极限,将每一堂课,都变成令人发指的折磨。

另一边的华薇薇,这时候也在侧着头,观察着自己的伙伴,或者说队友。

出于一个少女的天性,华薇薇总是对长得文弱的男生,有些莫名的好感。最重要的是,华薇薇在柳梦潮的身上,并没有看到,一种赤。裸裸的****,这让她感到有一些放心。对于前途的未知,对于死亡的恐惧,这一刻,不得不让她,把自己的安危寄托在柳梦潮的身上。

华薇薇撩起了自己的头发,勾在了自己纤细透明的耳朵上。她并没有觉得这有什么不对,女孩子,特别是像自己这样,长得并不丑的女孩,本就该是像蔓藤一样,攀附在男人身上,然后轻轻松松的借着力,渡过一切难关,享受美妙的生活,就像刚刚认识的章清清一样。一切,都由泛着臭味的男人去打点,自己要做的,只是露出傻傻的,有些天真的微笑就可以了。

柳梦潮并不知道华薇薇的想法,因为他已经被老师点名站了起来。

“柳同学……”戴着黑框眼镜的数学老师,一脸嫉妒的叫起了柳梦潮,“这道题,你来给大家解答一下。”

刚刚从出神状态,解脱出来的柳梦潮,睡眼惺忪地看了眼,数学老师给出的题目。

“已知在数列{An}和{Bn}中,A1=B1-2.

(1)若n*A(n+1)=(1+1/n)An*An+(2/n)(1+n)An+(1+n-n*n)/n,求通项An;

(2)若n*Bn*(2+Bn)=(1+1/n)B(n+1)+(1+n-n*n)/n,求通项Bn;

(3)在(1)、(2)的条件下,设Cn=ln[(1+An)(1+Bn)],求Cn的前n项和Cn.”

呵呵……不会……

柳梦潮只觉得自己,满脑袋的黑线。这不是动漫世界吗,怎么老师还会给自己出数学题,最重要的是,自己完全都不会做啊!不如把数学老师也抹杀掉吧……?

“不会做吧?”数学老师兴高采烈地看了眼,站起来的柳梦潮。要是这个男的又受女生欢迎,成绩又好,那就完全没有天理了!

“你上课要认真听讲!”

咄咄。

铅笔轻轻地点了点笔记本,推到了柳梦潮的面前。

笔迹很是纤细,就像是古代的仕女画,虽然有些潦草,但是每个字,都能够看的清清楚楚。

毫不迟疑,柳梦潮照章读出了下面的答案。

“第一题,首先等式两边,均加上n,然后等式两边均乘以n,整理得

:[1+A(n+1)]/(1+n)=[(1+An)/n]^2

两边取对数ln

得:数列{[ln(1+An)/n]}是首项为ln3,公比为2的等比数列,易求得

(1+An)/n=3^[2^(n-1)],

则An={3^[2^(n-1)]}*n-1.”

“完全……正确……”数学老师不可思议地,看着侃侃而谈的柳梦潮。刚刚那道题目,即使是最出色的学生,也不可能脱口而出地报出答案。

没有草稿和笔记……难道现在的中国学生,都是天才不成?!

“咳咳……”柳梦潮显然也注意到了,数学老师的表情,只见他抬着头,缓缓地读着,笔记本上的答案。

“(2)类比(1)整理得(1+n)[1+B(n+1)]=[n(1+Bn)]^2,类比(1)易求得n(1+Bn)=3^[2^(n-1)],则Bn={3^[2^(n-1)]}/n-1.。”

柳梦潮的刚把答案报完,桂言叶的脸,立刻就红了起来。一方面,,是因为第三小问的答案,她还没有写,更主要的,她完全不知道,自己怎么会做出这样的举动。

害羞……

或者说害怕……?

桂言叶死死地低着头,看都不敢看,已经坐下来的柳梦潮。

嘭嘭……

心脏在跳动,手心里,也不知不觉地沁出了细汗,桂言叶悄悄地,从发梢的空隙,偷偷看了柳梦潮一眼,立刻重又低下了头。

银色的手机,这一刻被她紧紧地攥在手里。

咔哒……

翻盖手机,被打开了来。黯淡的屏幕,这一刻却成为了桂言叶的镜子,小心翼翼地照出了柳梦潮的脸。

他的笑容,很干净,就像是一缕阳光,并不刺眼,却又很温暖。

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