已知二次函数y=f1(x)的图象以原点为顶点且过点(1,1),反比例函数y=f2

题型:解答题

问题:

已知二次函数y=f1(x)的图象以原点为顶点且过点(1,1),反比例函数y=f2(x)的图象与直线y=x的两个交点间距离为8,f(x)= f1(x)+ f2(x).

(Ⅰ) 求函数f(x)的表达式;

(Ⅱ) 证明:当a>3时,关于x的方程f(x)= f(a)有三个实数解.

考点:一次函数的性质与应用二次函数的性质及应用
题型:解答题

Brave

Type: 3D cartoon  Comedy        Running time: 95 minutes

Merida, a princess, refused to marry a person that she dislikes. This causes trouble for her family and the whole country. Merida turns to a witch(女巫) for help. In doing so, her family and the country are in danger. Merida must save her family and the country before it is too late. X K b1.C  om

The Grey

Type: Action         Running time: 117 minutes

The Grey is based on the short story “Ghost Walker” written by Ian Mackenzie Jeffers. It’s about a number of oil men who are in trouble in Alaska after a plane crash(空难). They have to fight against grey wolves that threaten their lives.

Mirror Mirror

Type:          Running time: 106 minutes

You must know the story of Snow White. Would you like to see this story again? Come to see Mirror Mirror. It’s a comedy about Snow White. Lily Collins and Julia Roberts are the main actresses in this interesting movie.

Chimpanzee

Type: Documentary      Running time: 78 minutes

This movie is directed by Alastair Fothergill and Mark Linfield. It’s a 2012 nature documentary film about a young chimpanzee named Oscar. He is alone in the African forests until he is raised by another chimpanzee. The chimpanzee takes care of Oscar like his own child.

 

小题1: How many documentaries are mentioned in the passage?

A.One.

B.Two.

C.Three.

D.Four.小题2:Which movie lasts the longest time?

A.Brave.

B.The Grey.

C.Chimpanzee.

D.Mirror Mirror.小题3:Which statement about the movies is true?

A.Mirror Mirror is directed by Lily Collins and Julia Roberts.

B.The Grey directed by Ian Mackenzie Jeffers is based on a short story.

C.You can’t see many beautiful nature sights in Chimpanzee.

D.Brave is about a princess who obeys her heart.小题4:Who starred in(主演) one of the movies?

A.Lily Collins and Julia Roberts.

B.Alastair Fothergill and Mark Linfield.

C.Ian Mackenzie Jeffers.

D.Merida.小题5:Where can you probably read this passage?

A.In a nature magazine.

B.In a storybook.

C.In an entertainment newspaper.

D.In a science book.

题型:解答题

已知集合P={y|y=x2+1,x∈R},Q={y|y=x2+2x,x∈R},则集合P∩Q=(    )。

题型:解答题

抽吸油剂药液时,可稍(),后用稍粗针头吸取。

题型:解答题

用以简要表示建筑物的内部结构形式、空间关系的建筑设计图是( )。

A.建筑剖面图

B.建筑构造详图

C.建筑平面图

D.总平面图

题型:解答题

行车速度大于3.4m/s时,选用道岔的曲线半径不得小于通过电机车最大轴距的()

A、5倍

B、10倍

C、15倍

更多题库