Fang Yifan's meaning was very obvious. He was raising the stakes.
He deliberately wanted to embarrass Cao Kun in front of Qiao Yingzi and Huang Zhitao.
To be honest, Cao Kun was not interested in this additional stake at all.
However, he felt that if Tong Wenjie called him father…
Instantly, his interest was piqued.
"Fang Yifan, you can call me Daddy now.”
"Why? You don't even know how to solve a single question!"
"I don't think I'm the one calling you daddy. You should be the one calling me daddy!”
Cao Kun held the paper in one hand and flicked his fingers with the other.
"I'm sorry, but I've already finished this paper.”
"Impossible!" "You clearly didn't do a single question!" Fang Yifan said loudly.”
"Keep your voice down. Don't disturb the neighbors downstairs. Also, I calculated the result in my mind, but I didn't write it down.”
Qiao Yingzi and Huang Zhitao looked at each other, their eyes wide in disbelief.
"Who doesn't know how to brag?" Then let me ask you, what is the answer to the third multiple-choice question?”
“B。”
Fang Yifan hadn't done this question yet. He had taken a look and felt that this question was very difficult for him, so he asked this question.
Qiao Yingzi, who was at the side, had already done it. She said in surprise,"Correct answer!"
"It doesn't count, it doesn't count. You guessed the multiple-choice questions. It can only mean that you were lucky, so you guessed correctly.”
Fang Yifan immediately expressed that he wanted to change the question."Given that f(x)=x(2015 Inx), if f(x0)=2016, then x0 =?”
Cao Kun said without thinking, Using the derivation rule, f (x)=x (2015 Inx)
f (x)=2015 Inx 1= Inx 2016, then f (x0)= Inx0 2016=2016, that is, x0 =1, where the derivative of xInx is Inx 1.”
This question was too difficult for Fang Yifan, who was a slacker. He didn't know how to do it.
He looked at Qiao Yingzi eagerly.""Yingzi, is the answer correct?"
"Let me calculate."
Qiao Yingzi naturally knew how to answer such questions, but it would take some time.
Not long after, Qiao Yingzi nodded.""The answer is correct."
"Impossible, impossible, this is absolutely impossible!”
Fang Yifan found it hard to accept such a result."Cao Kun, do you know the answer? Should I change the question?"
As he spoke, Fang Yifan flipped the paper over and pointed at the comprehensive questions at the back.
"Let the function f(x)=ax-b/a, the curve y=f(x) at the point (2, f(2)) has the equation 7x-4y-12=0.
(1) Find the analytical expression of y=f(x)
(2) Prove that the area of the triangle formed by the tangents at any point on the curve y=f(x), the line x=0, and the line y=x is a fixed value, and find this fixed value.”
Cao Kun directly gave the answer,"The equation for the first line is 7x-4y-12=0, which becomes y=7/4x-3. When X=2,y=0.5.
At the same time, f(x)=a, so a=7/4
Substituting (2,0.5) into the original equation gives b=6,
Therefore, the original equation is f(x)=7/4x-3.”
Fang Yifan had a dumbfounded look on his face,[Is this bastard for real?] The speed at which he said the answer was even faster than the speed at which he said the question!
Even a top student like Qiao Yingzi and Huang Zhitao wasn't this amazing!
Could it be that Cao Kun was really the father of a top student?!
Qiao Yingzi quickly answered the question, while Huang Zhitao picked up a pen and found a piece of white paper. She began to do the reverse calculation.
The two of them came to a conclusion almost at the same time."Correct answer!"
"Oh my god, Cao Kun, why are you so powerful?”
"Is this really the answer you calculated and not the answer you memorized?”
Unbelievable, this was simply unbelievable!
Qiao Yingzi and Huang Zhitao, the two top students, both knew that it was too difficult to calculate the answer in seconds.
Even the top lecturer, Song Qian, or her school teacher, Li Meng, could not do this!
Cao Kun smiled at the two shocked top students and said,""If you don't believe me, you can continue asking questions.”
Qiao Yingzi and Huang Zhitao looked at the last question. Usually, the last question was the most difficult, and this time was no exception.
Just as the two of them were about to ask Cao Kun the last question.
"First Uncle went to Second Uncle's house to find Third Uncle and said that Fourth Uncle was tricked by Fifth Uncle into going to Sixth Uncle's house to steal Seventh Uncle's money, which was in Eighth Uncle's cupboard. Ninth Uncle borrowed 1000 yuan from Tenth Uncle to pay Eleventh Uncle." 1. Who is the thief? 2. Whose money is it?"
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