中职数学学业水平考试复习(第三章)

中职数学学业水平考试复习(第三章)
中职数学学业水平考试复习(第三章)

1

中职数学学业水平考试复习(第三章)

*考纲要求:

(三)函数

1.

了解函数定义,会求形如()f x =1()f x ax b

=

+函数的定义域。 2.了解符号()f a 的含义,会求函数值。

3.理解函数的三种表示法(解析法、列表法、图像法),会用解析法表示函数;会用待定系数法求一次函数的解析式。

4.理解函数单调性的定义,会根据函数的单调性,比较同一单调区间内函数值的大小;能根据函数图像判断函数的单调性并写出函数单调区间。

5.理解函数的奇偶性的定义,会判断简单函数的奇偶性。

6.了解分段函数的概念,会求简单分段函数的函数值和定义域。

7.了解函数的简单应用,能借助函数的知识和方法,解决简单实际问题(注意避免复杂运算)。

第三章:函数

一、选择题

1、下列各点中,在函数13-=x y 的图像上的点是( )。

A .(1,2) B.(3,4) C.(0,1) D.(5,6)

2、函数3

21-=x y 的定义域为( )。 A .()+∞∞-, B.??? ??+∞??? ??∞-,2323,Y C.??????+∞,23 D. ??? ??+∞,23 3、下列函数中是奇函数的是( )。

A .3+=x y B.12+=x y C.3x y = D.13+=x y

4、函数34+=x y 的单调递增区间是( )。

A .()+∞∞-, B. ()+∞,0 C. ()0,∞- D.[)∞+.0

5、点P (-2,1)关于x 轴的对称点坐标是( )。

A .(-2,1) B.(2,1) C.(2,-1) D.(-2,-1)

6、点P (-2,1)关于原点O 的对称点坐标是( )。

A .(-2,1) B.(2,1) C.(2,-1) D.(-2,-1)

7、函数x y 32-=的定义域是( )。

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