第一百五十四章 在我眼里,你们就是渣!(2 / 2)

立时就有人要嘲讽了:“呵, 你也知道啊……”

“现在!”秦克提高了声音,锐利而张狂的目光横扫众人:“我站在这里, 却不是来听你们嘲讽的, 而是让你们见识见识,什么叫真正的学神实力!”

“现在是8:10,离入场考试还有点时间,我们来玩个十分钟擂台游戏如何?我就站在这里,你们任何一个人都可以出奥数题来挑战!我倒要看看,你们所谓的难题,到底有多简单!”

四周再次一片哗然。

嚣张,太嚣张了!能来这里参加国赛的,哪个不是尖子生,超级学霸?

可从没见过这样嚣张的家伙!

秦克伸出手指勾了勾:“来吧,谁先来,别浪费时间!把题目念出来就行,最好你们自备答案,我现场口述解题思路和最终答案,你们自己翻答案对着!”

口述解题思路还行,可连最终答案都能答出来?

这怎么可能!

众人眼中的嘲讽与不信之色更浓。

“呵,秦克是吧,你是我见过最狂傲的家伙!”立时便有个眼镜学生站了出来,他随手掏出一份卷子,将题目念了出来:

“已知 a、b 都是不等于零的常数,变量θ满足不等式组asinθ+bcosθ≥0,acosθ-bsinθ≥0,求sinθ的最大值。”

众人一听这题,都皱起了眉,这题并不算顶级难度,但在国赛题目里肯定也算是中上水平了,起码在场有一半以上的都要苦思如何解题,想解出来怕得半小时以上。

但秦克几乎在那眼镜学生念完题目便开始回答了:

“这题用数形结合就能轻易做出来。令 x = cosθ, y = sinθ,约束条件转化为bx + ay ≥0 ,ax - by ≥0 ,x^2+y^2=1,也就相当于把问题转化为求圆在特定区域内纵坐标的最大值……”

“所以,当a ≤- b 时,ymax =-b/(a^2+b^2)^1/2。”

“当a >- b 时,ymax =a/(a^2+b^2)^1/2。这也是sinθ的最大值。”

听着秦克流畅得就像背答案一样把解题步骤全说了出来,在场所有的考生都瞪大了眼睛,因为他们光是靠听,也未必能跟得上秦克的思路。

有人推了推那个眼镜学生:“喂,他最后的答案对不对?”

眼镜学生这才赶紧翻出答案来看了看,他吞了口唾沫,不敢置信地颤声道:“对……对的。”

全场一片哗然。

有没有搞错,全程心算,没动过笔和草稿纸,就完成了一道极有难度的奥数题?

“你们是不是在配合演戏啊?”因为实在太难以置信,有人怀疑道。

秦克看向他:“那你出题吧,最好快点,因为刚才已过了四分钟。”

那人是个高瘦的学生,他赶紧翻出错题本,从里面选了道他认为极难的题目念了出来。

秦克依然秒答,几乎没任何思考便口头将难题解了出来。

那高瘦学生失魂落魄,喃喃道:“这不可能……我当时做了一个小时都没能做出来……他怎么可能秒答?还全程心算?”

“还有没有挑战我的?”秦克负手而立,莫名地有几分大宗师的气度。

在场的学生人人倒抽口凉气,刚才那两道难题连他们听了都未必有把握能解出来,可这秦克,竟斩瓜切菜般就解了出来?

又有两个不信邪的学生提出问题,秦克依然秒答。

于是现场又多了两个双眼无神,失魂落魄、信心全无的考生。

这时有领队发现不对劲了,在场的考生人人脸色发青,大受打击的模样,忙过来拉回自己的学生。

场面变得混乱起来。

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