第十三章 学霸的一对一辅导(1 / 2)

这几天的顾漫忙的晕头转向,原因是学霸给她强制性布置了一整本考试题集的作业,两天内要写完!这让原本课余时间就不多的顾漫来说,更是雪上加霜</p>

教室里,顾漫做题做得有点崩溃,这叫什么事儿她始终没搞明白,贺辰怎么就跟她杠上了?虽然人家是好心送她题集,但无缘无故的,他干啥对自己这样?没道理呀!</p>

但是有些事,哪来那么多道理可讲呢</p>

顾漫做着手里的题集,脑子里全是方程式,不等式,函数,幂……</p>

好在里面有部分的题型,是之前杨乐帮她辅导过的,对应的解题思路她也熟悉,做起来相对轻松,这让她稍感安慰。</p>

即便如此,里面那些她之前没接触过的题型,依然让她头疼不已!她经常写着写着不是卡在这道题上,就是卡在那道。</p>

也不知道贺辰上哪搜罗来的考试题集,里头涵盖了各种数学题型,简单的一道没有,难题一大堆!不过按贺辰的水平,也难怪了,学霸做的题,它能简单到哪儿去?</p>

顾漫对着某道题已经抓耳挠腮了一阵子了,她做不出来呀!</p>

设点P(x,y)是直线x+y=6上第一象限内的点,点A的坐标为(4,0),三角形OPA的面积为S</p>

(1)求出S关于x的函数解析式</p>

(2)当S=10时,求出P点的坐标</p>

(3)当P在何处时,三角形OPA是以OA为底边的等腰三角形</p>

顾漫又看了一遍题目,她有点头大,这题难度太刁钻了吧?苦思冥想了一阵无果后,确认了,是她不会做的题!</p>

手里的笔往桌上一放,她转头准备请教同桌,看到身旁空无一人时,才想起来杨乐今天请了假,说是昨天回家脚扭了,今天去医院。</p>

顾漫有些惆怅,乐乐不在身边,她不习惯呀这下没人帮她解题了,这可咋整?还等着写完给贺辰交作业呢!一想到万一真没写完,以后学霸的资料笔记都没戏了,她愁的不行。</p>

“做的怎么样了?”</p>

某学霸似乎在顾漫身上装了监控,顾漫正愁题不会做,他就来了,好巧</p>

“发什么呆?问你话呢!”见顾漫没动静,贺辰又问。</p>

“哦哦,大部分写完了,就是,还有些题不会……”顾漫在考虑要不要问他,又怕他像之前一样发脾气。</p>

顾漫犹豫间,看到贺辰离开座位慢慢走到她身边。</p>

“给我看看”</p>

他拿起那本题集,先翻了翻顾漫之前做完的题目,像检查作业一般,一页页过目,“恩,大部分题目都做对了,哪题不会?”</p>

“就这题,不会解”顾漫指着那道让她头疼了很久的题目,语气很是无奈。</p>

贺辰看了看题目,随即弯下腰,从顾漫手里拿来笔,在她身边躬着身体,扯过她的草稿本开始手把手现场辅导。</p>

“这题我笔记里有类似的,你没认真看笔记”</p>

贺辰有点气,借那么多次笔记,到底有没有认真看?表情不自觉严肃了起来。</p>

“认,认真看了的,可能内容太多,忘,忘了……”看着贺辰突然严肃起来的表情,和老师一样的说话口吻,不知怎的,她有点怕怕。</p>

“恩,教你解一次,要记住解题思路。”</p>

“好”</p>

“x+y=6即y=6-x,</p>

(1)S=×OA×y=×4×=12-2x</p>

所以S=12-2x</p>

(2)当S等于10的时候,也就是12-2x等于10,可算出x=1,再带入x+y=6,可得到y=5</p>

即得坐标P(1,5)</p>

(3)既然等腰,那就是两边对称,可知P点的x坐标值:</p>

x=(1/2)×(0A)=2</p>

y=6-x=4</p>

即P点坐标为P”</p>

“就这么简单?”顾漫看他的解题速度,她都怀疑自己刚才跟他看的是一个题吗?烦了她这么久的一道题,被他一下子就解决了!会不会太不尊重这道题了?</p>

顾漫想吐槽,但学霸就是学霸,三下五除二一道难题给他分分钟解决了,顾漫对他的佩服程度又升了一个档次!</p>

“恩,就这么简单”</p>

贺辰一贯的自信,就好像是家常便饭一样的自然。对他来说,解一道题目也就几分钟,确实不是什么难事</p>

“你再看看,有不懂的再问”贺辰说完又坐回了座位。</p>

顾漫老实听话地拿起了他写的解答过程看了又看,困扰了她很久的难题终于给她解决了,而且贺辰的解答过程写的精简又明了,她一看就懂!</p>

不得不说,哪怕她一个人再刻苦钻研,都抵不过一个技术过硬的老师在边上适时地辅导呀!</p>

平时她有问题都找杨乐,大部分问题也能快速解决,但有时候碰上难一点的,免不得要两个人一起琢磨半天,这从效率上看,好像还是在贺辰这里高一点!</p>

当然不是贬低杨乐的意思,两个都是很优秀的人,只能说,杨乐是非常优秀的,但贺辰,他是优秀的有点奇葩!以至于任何同龄人在他面前,都难免变成陪衬。以他的水平,完全可以抵得上一个老师的作用!</p>

实际领教了学霸的辅导功力,在请教贺辰的事情上,顾漫果然变得积极多了,很多难点在听过贺辰跟她讲解后,顾漫开始举一反三触类旁通,做题效率也有明显提高。</p>

顾漫对着题集奋笔疾书,短短的课间很快结束。接下来是节体育课,顾漫收了笔准备往外走。</p>

刚越过贺辰,后衣领被人一把扯住,“上哪去?”</p>

贺辰的手准确逮住了顾漫的衣领,上课铃刚响,这姑娘就想着往外冲?</p>

“你,手撒开……”顾漫有气无力看着贺辰,“干什么又抓我衣领?”</p>

这习惯可不好,得改!</p>

贺辰意识到自己又冲动了,怎么碰上她老是管不住手?</p>

他有点懊恼地收了收手。</p>

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