(一)选择题
(辽宁文)(11)函数)(x f 的定义域为R ,2)1(=-f ,对任意R ∈x ,2)(>'x f ,则
42)(+>x x f 的解集为
(A )(1-,1) (B )(1-,+∞) (C )(∞-,1-) (D )(∞-,+∞) (重庆文)3.曲线223y x x =-+在点(1,2)处的切线方程为 A .31y x =- B .35y x =-+
C .35y x =+
D .2y x =
(重庆文)6.设1
133
3
124
log ,log ,log ,,,233a b c a b c ===则的大小关系是
A .a b c <<
B .c b a <<
杨义勇事件C .b a c <<
D .b c a <<
(重庆文)7.若函数1
()2
f x x n =+-(2)n >在x a =处取最小值,则a =
A
.1 B
.1 C .3
D .4
(辽宁文)(6)若函数)
)(12()(a x x x
x f -+=
为奇函数,则a =
(A )
21 (B )32 (C )4
3
(D )1 (上海文)15.下列函数中,既是偶函数,又是在区间(0,)+∞上单调递减的函数为〖答〗
A .2
y x -=
B .1
y x -=
C .2
y x =
D .1
3
y x =
(全国新课标文)(3)下列函数中,既是偶函数又在(0,)+∞单调递增的函数是
(A )3y x = (B )||1y x =+ (C )21y x =-+ (D )||2x y -= (全国新课标文)(10)在下列区间中,函数()43x
f x e x =+-的零点所在的区间为
(A )1
王磊晓芬全文阅读
(,0)4- (B )1(0,)4 (C )11(,)42 (D )13(,)24
(全国新课标文)(12)已知函数()y f x =的周期为2,当[1
,1]x ∈-时2()f x x =,那么函数()y f x =的图象与函数|lg |y x =的图象的交点共有A (A )10个 (B )9个 (C )8个 (D )1个 (全国大纲文)10.设()f x 是周期为2的奇函数,当0≤x≤1时,()f x =2(1)x x -,则5
()2
f -=
A .-
1
2
B .1 4
-
C .
14
D .
12
(湖北文)3.若定义在R 上的偶函数()f x 和奇函数()g x 满足()()x
f x gx e +=,则()
g x =
A .x
x
巴士之家
e e
-- B .
1()2
x x
e e -+ C .
1()2
x
x e e -- D .
1()2
x x
e e -- (福建文)6.若关于x 的方程x 2+mx+1=0有两个不相等的实数根,则实数m 的取值范围
是 A .(-1,1) B .(-2,2) C .(-∞,-2)∪(2,+∞) D .(-∞,-1)∪(1,+∞)
(福建文)8.已知函数f (x )=。若f (a )+f (1)=0,则实数a 的值等于
A .-3
B .-1
C .1
D .3
(福建文)10.若a>0,b>0,且函数f (x )=3
2
42x ax bx --在x=1处有极值,则ab 的最大值等于
A .2
B .3
C .6
D .9
(山东文)3.若点(a,9)在函数3x y =的图象上,则tan=
6
a π
的值为
(A )0 (B)
(C) 1 (D) (山东文)4.曲线211y x =+在点P(1,12)处的切线与y 轴交点的纵坐标是 (A)-9 (B)-3 (C)9 (D)15
(山东文)10.函数2sin 2
x
y x =
-的图象大致是C
(陕西文)4. 函数13
y x =的图像是 ( )
(陕西文)6.方程cos x x =在(),-∞+∞内 ( ) (A)没有根 (B)有且仅有一个根 (C) 有且仅有两个根 (D )有无穷多个根
(四川文)4.函数1
()12
x y =+的图象关于直线y =x 对称的图象像大致是
(四川文)11.在抛物线25(0)y x ax a =+-≠上取横坐标为14x =-,22x =的两点,过这两 点引一条割线,有平行于该割线的一条直线同时与抛物线和圆225536x y +=相切,则抛物线顶点的坐标为 (A )(2,9)-- (B )(0,5)- (C )(2,9)- (D )(1,6)-
(天津文)5.已知244log 3.6,log 3.2,log 3.6a b c ===则 A .a b c >> B .a c b >> C .b a c >>
D .c a b >>
(天津文)8.对实数a b 和,定义运算“⊗”:,1,
, 1.
a a
b a b b a b -≤⎧⊗=⎨
->⎩设函数
2()(2)(1),f x x x x R =-⊗-∈。若函数()y f x c =-的图象与x 轴恰有两个公共点,
则实数c 的取值范围是 ( ) A .(1,1](2,)-⋃+∞ B .(2,1](1,2]--⋃
C .(,2)(1,2]-∞-⋃
保护蔬菜
D .[-2,-1]
(浙江文)(10)设函数()()2
,,f x ax bx c a b c R =++∈,若1x =-为函数()2
f x e 的一个
极值点,则下列图象不可能为()y f x =的图象是
(江西文)3.若12
1
()log (21)
f x x =
+,则()f x 的定义域为( )
A.1(,0)2-
B.1(,)2-+∞
C.1(,0)(0,)2-⋃+∞
D.1(,2)2
-
(江西文)4.曲线x y e =在点A (0,1)处的切线斜率为( ) A.1 B.2 C.e D.1
e
(湖南文)7.曲线sin 1sin cos 2x y x x =
-+在点(,0)4
M π
处的切线的斜率为( )
A .12-
B .12 C
.2- D
.2
(湖南文)8.已知函数2
()1,()43,x f x e g x x x =-=-+-若有()(),f a g b =则b 的取值范
围为
A
.[2 B
.(2 C .[1,3] D .(1,3)
(北京文)(3)如果112
2
log log 0x y <<,那么
(A )1y x << (B)1x y << (C)1x y << (D)1y x <<
(北京文)(7)某车间分批生产某种产品,每批的生产准备费用为800元。若每批生产x 件,
则平均仓储时间为
8
x
天,且每件产品每天的仓储费用为1元。为使平均到每件产品的生产准备费用与仓储费用之和最小,每批应生产产品
(A )60件 (B)80件 (C )100件 (D )120件
(安徽文)(5)若点(a,b )在lg y x = 图像上,a ≠1,则下列点也在此图像上的是D
(A )(
a
1
湖南卫视百科全说,b ) (B )(10a,1-b ) (C ) (
a
10
,b+1) (D )(a 2,2b )
(安徽文)(10)函数2)1()(x ax x f n -=在区间〔0,1〕
上的图像如图所示,则n 可能是A (A )1 (B )2
(C )3
(D )4
(广东文)4.函数1
()lg(1)1f x x x
=
++-的定义域是 A .(,1)-∞- B .(1,)+∞ C .(1,1)(1,)-⋃+∞ D .(,)-∞+∞
4.(C ).10
110
x x x -≠⎧⇒>-⎨
+>⎩且1x ≠,则()f x 的定义域是(1,1)(1,)-⋃+∞
(广东文)10.设(),(),()f x g x h x 是R 上的任意实值函数,如下定义两个函数()f g ()
轧钢论坛x 和()f g ()x :对任意x ∈R ,()f g ()x =(())f g x ;()f g ()x =()()f x g x ,则下列等式恒成立的是
A .(()f g h )()x =(()f h ()g h )()x
B .(()f g h )()x =(()f h ()g h )()x
C .(()f g h )()x =(()f g ()g h )()x
D .(()f g h )()x =(()f g
()g h )()x 10.(B ).对A 选项 (()f g
h )()x =()f g ()()x h x (())()f g x h x = (()f h ()g h )()x =()f h (()(
)g h x )=()f h ((()()g x h x ) (()())(()())f g x h x h g x h x = ,故排除A
对B 选项 (()f g h )()x =()(())f g h x = (())(())f h x g h x
(()f h
()g h )()x =()()()()f h x g h x (())(())f h x g h x =,故选B
对C 选项 (()f g h )()x =()(())f g h x ((()))f g h x =
(()f g ()g h
)()x =()(()())()((()))f g g h x f g g h x = (((())))f g g h x =,故排除C
对D 选项 (()f g h )()x =()()()()()()f g x h x f x g x h x =
(()f g
()g h )()x =()()()()()()()()f g x g h x f x g x g x h x = ,故排除D
(天津文)8.对实数a b 和,定义运算“⊗”:,1,
, 1.
a a
b a b b a b -≤⎧⊗=⎨
->⎩设函数
2()(2)(1),f x x x x R =-⊗-∈。若函数()y f x c =-的图象与x 轴恰有两个公共点,
则实数c 的取值范围是 ( B ) A .(1,1](2,)-⋃+∞ B .(2,1](1,2]--⋃
C .(,2)(1,2]-∞-⋃
D .[-2,-1]
(二)填空题
(辽宁文)(16)已知函数a x e x f x +-=2)(有零点,则a 的取值范围是____(,2ln 22]-∞-_______.
(山东文)16.已知函数f x ()=log (0a 1).a x x b a +-≠>,且当2<a <3<b <4时,函数
f x ()的零点*0(,1),,n=x n n n N ∈+∈则 .
【答案】5
【解析】方程log (0a 1)a x x b a +-≠>,且=0的根为0x ,即函数log (23)a y x a =<<;的图象与函数(34)y x b b =-<<;的交点横坐标为0x ,且*0(,1),x n n n N ∈+∈,结合图象,因为当
(23)x a a =<<;时,1y =,此时对应直线上1y =的点的横坐标1(4,5)x b =+∈;当2y =时,
对数函数log (23)a y x a =<<;的图象上点的横坐标(4,9)x ∈,直线(34)y x b b =-<<;的图象上点的横坐标(5,6)x ∈,故所求的5n =.
(上海文)3.若函数()21f x x =+的反函数为1()f x -,则1
(2)f --= 3
2
-
。 (上海文)14.设()g x 是定义在R 上.以1为周期的函数,若()()f x x g x =+在[0,1]上的值域为[2,5]-,则()f x 在区间[0,3]上的值域为 [2,7]- 。 (四川文)16.函数()f x 的定义域为A ,若12,x x A ∈且12()()f x f x =时总有12x x =,则称()
f x 为单函数.例如,函数()f x =2x +1(x ∈R )是单函数.下列命题:
①函数2()f x x =(x ∈R )是单函数;