Since the construction takes time, things come to an end first.

  Shu Cheng went to class all day long to drill into the library, and then he was bored and was found by Shen He to record an interview program.

  This talk show is currently a very popular show in the Z country. The host Yu Jie’s hosting style is serious but also witty. She will spoof the guests from time to time, but it will not be excessive, so it is deeply loved by the audience.

   "Yu Jie interview recording has been agreed."

"when?"

   "About tomorrow morning, I will rush to Tsinghua University to interview you."

   "Yoohoo, am I such a big hit??"

   "...According to Yu Jie's personality, it should come very early, to catch you by surprise, pay attention to the image."

   Shu Cheng frowned: "...I have a bad image some day?"

  Shen He: "If you don’t comb your hair in the morning, it's messy like a chicken coop."

   "Nonsense." Shu Cheng rubbed his hair, "I obviously didn't get up in the morning during the holiday."

  Shen He: "..."

  "And combing my hair, don’t I have a daughter-in-law?"

  Shen He: "..." Haha.

   "I have put him to sleep, he is relying on me!"

  Shen He: "..." Do you feel my speechlessness? ?

   "Forget it, if you talk to a single dog like you, you don't understand it. This kind of suffering is not something you can understand. It's really annoying."

  Shen He: "!!!" Shu Cheng, you have a daughter-in-law, you are very six!

  ...

  However, at this time, Yu Jie had already investigated Shu Cheng’s schedule for today.

Standing in front of the camera, Yu Jie made an "OK" gesture to the staff, adjusted her state, and said, "Hello everyone, this is Tsinghua University. This time everyone we are going to interview should guess that it is. Who is it?"

   "Yes, it is Shu Cheng, the young man who won the laurel of the queen and actor alone, the father of Harry Potter, the world-renowned best-selling author, and the king of Internet literary An Zhi Ruo Su!"

The figure of Yu Jie standing at the gate of Tsinghua University attracted many Tsinghua students to stop and watch. Yu Jie’s interviews have always been very popular, and many people know her. Seeing this posture, you can know that it must be an interview with Shu Cheng. of.

  At this time, Shu Cheng was reading in the library boringly.

  From time to time, girls will look in the direction of Shu Cheng, and sometimes they will ask Shu Cheng to explain with a book of high math exercises.

"This problem should be done in this way, the solution: set f(x)=x3?3ax+a, obviously f(x) is continuous and differentiable in the interval [0,1], and f′(x)=3 (X+√a) (x-√a).

(1) When a≥1, f(x) has no stagnation point in the interval (0,1), and at this time f′(x)0;, f(1 )=1-2a＜0

(2)…

…? When f(√a)=a(1-2√a)<0, and f(1)=1-2a≤0, that is, 1/2≤a<1, f(x) is in the interval (0 , 1) there is only one zero point,

  At this time, the original equation has only one real root in the interval (0,1). "Shu Cheng's voice was slow and patiently explained to the girls, not at all disgusting that the topic was too simple.

  At this moment, the phone rang.

   "Sorry, I will answer a call."

   "It's okay, you can pick it up."

  Shu Cheng walked aside, pressed to answer the call, and a calm voice came from the other side.

   "The hostess of "The Legend of Sword and Fairy" has been found."

   "Oh, really? I want to see her." Shu Cheng said.

  The girl saw Shu Cheng answering the phone, and she glanced at the book Shu Cheng was reading when she was bored.