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1、1 高中数学函数练习题1、下列函数中,值域是(0,+)的函数是A151xyBxy21C1)21(xyDxy1)31(2、已知32()26f xxxa(a是常数),在2,2上有最大值3,那么在2,2上的最小值是A5 B11 C.29D373、已知函数322xxy在区间 0,m 上有最大值3,最小值2,则 m 的取值范围是A、1,+)B、0,2 C、(-,2 D、1,2 4、若函数)10(log)(axxfa在区间2,aa上的最大值是最小值的3 倍,则 a=A.42B.22C.41D.215、函数()log(1)0,1xaf xax在上的最大值与最小值之和为a,则 a 的值为(A)41(B)21(
2、C)2(D)4 6、若122yx,则12xy的最小值是 _43yx的最大值是 _ 7、已知函数)12lg(2xaxy的值域为R,则实数a的取值范围是 _ 8、定义在R 上的函数()f x满足()()()2(,),(1)2fxyf xf yxy x yRf,则(0)f=,(2)f=。9、若211(1)3xf x,则()f x=,函数()f x的值域为。10、对任意的x,y 有()()2()()f xyf xyf xfy,且(0)0f,则(0)f=,(1)(1)ff=。11、函数21()()fxxx的值域为。12、二次函数247,0,3yxxx的值域为。13、已知函数(1)6gxxx,则()g x
3、的最小值是。14、函数265yxx的值域是。15、函数24 1yxx的值域是。16、求下列函数的值域2(1)11eexxy(2)xxy2225.0(3)33xxy(4)231,(10)1xxyxx(5)125xyx (6)1(12)25xyxx(7)222312xxyxx (8)cos2sinxyx(9)17、已知2214xy,求23yx的最大值和最小值.18、设函数()yf x是定义在(0,)上的减函数,并满足1()()(),()1.3f xyf xf yf(1)求(1)f的值;(2)若存在实数m,使得()2f m,求 m 的值;(3)如果()(2)2f xfx,求 x 的取值范围。19、若
4、()f x是定义在(0,)上的增函数,且()()xff xf yy。(1)求(1)f的值;(2)解不等式:(1)0f x;文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D
5、6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF
6、1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D
7、6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF
8、1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D
9、6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF
10、1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D63(3)若(2)1f,解不等式1(3)()2f xfx20、二次函数()f x满足(1)()2f xf xx,且(0)1f。(1)求()f x的解析式;(2)设函数()2g xxm,若()()f xg x在 R上恒成立,求实数m的取值范围
11、。函数检测一1已知集合421,2,3,4,7,3AkBaaa,且*,aNxA yB使B中元素31yx和A中的元素x对应,则,a k的值分别为()A2,3B3,4C3,5D2,52已知函数yf x()1定义域是23,则yfx()21的定义域是()A052,B.14,C.55,D.37,3设函数.)().0(1),0(121)(aafxxxxxf若则实数a的取值范围是。4函数)23(,32)(xxcxxf满足,)(xxff则常数c等于()A3B3C33或D35或5函数21()223f xxx的值域是。6已知0,1x,则函数21yxx的值域是.7若集合|32,Sy yxxR,2|1,Ty yxxR,
12、则STI是()ASB.TC.D.有限集8已知0,10,1)(xxxf,则不等式(2)(2)5xxf x的解集是。文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码
13、:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9
14、G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码
15、:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9
16、G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码
17、:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9
18、G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D64 9设函数21yaxa,当11x时,y的值有正有负,则实数a的范围。10 已知函数2()23(0)f xaxaxb a在1,3有最大值5和最小值2,求a、b的值。1112,x x是关于x的一元二次方程22(1)10 xmxm的两个实根,又2212
19、yxx,求()yf m的解析式及此函数的定义域。12已知,a b为常数,若22()43,()1024,f xxxf axbxx则求ba5的值。13当1,0 x时,求函数223)62()(axaxxf的最小值。函数检测二1已知函数)127()2()1()(22mmxmxmxf为偶函数,则m的值是()A.1B.2C.3D.45 设)(xf是定义在R上的一个函数,则函数)()()(xfxfxF在R上一定是()A奇函数B偶函数C既是奇函数又是偶函数D非奇非偶函数。3若函数2()48f xxkx在5,8上是单调函数,则k的取值范围是()A,40B40,64C,4064,UD64,4下列四个命题:(1)函
20、数f x()在0 x时是增函数,0 x也是增函数,所以)(xf是增函数;(2)若函数2()2f xaxbx与x轴没有交点,则280ba且0a;(3)223yxx的递增区间为1,;(4)1yx和2(1)yx表示相等函数。其中正确命题的个数是()A0B1C2D35已知定义在R上的奇函数()f x,当0 x时,1|)(2xxxf,那么0 x时,()f x.6若函数2()1xaf xxbx在1,1上是奇函数,则()f x的解析式为 _.7设a为实数,函数1|)(2axxxf,Rx8设()f x是奇函数,且在(0,)内是增函数,又(3)0f,文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL
21、9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E
22、1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL
23、9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E
24、1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL
25、9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E
26、1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL
27、9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D65 则()0 x f x的解集是()A|303xxx或B|303x xx或C|33x xx或D|3003xxx或9若函数()2f xa xb在0,x上为增函数,则实数,a b的取值范围是。10函数4()(3,6)2f xxx的值域为 _。函数的奇偶性和周期性一、选择题1下列函数中,不具有奇偶性的函数是()AyexexB ylg1x1xCycos2x D y sinxcosx答案D 2(2011山东临沂)设f(x)是 R
28、上的任意函数,则下列叙述正确的是()Af(x)f(x)是奇函数 B f(x)|f(x)|是奇函数Cf(x)f(x)是偶函数 D f(x)f(x)是偶函数答案D 3已知f(x)为奇函数,当x0,f(x)x(1x),那么x0,f(x)等于()Ax(1 x)B x(1 x)Cx(1 x)D x(1 x)答案B 解析当x0,f(x)(x)(1 x)又f(x)f(x),f(x)x(1 x)4若f(x)ax2bxc(a0)是偶函数,则g(x)ax3bx2cx是()A奇函数 B 偶函数C非奇非偶函数 D 既奇又偶函数答案A 解析由f(x)是偶函数知b 0,g(x)ax3cx是奇函数5(2010山东卷)设f(
29、x)为定义在R上的奇函数当x0 时,f(x)2x2xb(b为常数),则f(1)()A3 B 1 C 1 D 3 答案D 解析令x0,则x0,所以f(x)2x2xb,又因为f(x)在 R上是奇函数,所以f(x)f(x)且f(0)0,即b 1,f(x)2x2x1,所以f(1)221 3,故选 D.6(2011北京海淀区)定义在 R上的函数f(x)为奇函数,且f(x5)f(x),若f(2)1,f(3)a,则()Aa3 Ca1 答案C 解析f(x5)f(x),f(3)f(25)f(2),又f(x)为奇函数,f(2)文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码
30、:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9
31、G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码
32、:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9
33、G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码
34、:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9
35、G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码
36、:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D66 f(2),又f(2)1,a0()Ax|x4 B x|x4 Cx|x6 D x|x2 答案B 解析当x0,f(x)(x)3 8x3 8,又f(x)是偶函数,f(x)f(x)x38,f(x)x38,x0 x38,x0.f(x 2)x238,x0 x23 8,x0或x0,解得x4 或x0.故选 B.二、填空题8设函数f(x)(x1)(xa)为偶函数,则a_.答案1 解析f(x)x2(a1)xa.f(x)为偶函数,a10,a 1.9设f(x)ax5
37、bx3cx7(其中a,b,c为常数,xR),若f(2011)17,则f(2011)_.答案31 解析f(2011)a20115b20113c2011 7 f(2011)a(2011)5b(2011)3c(2011)7 f(2011)f(2011)14,f(2011)141731.10函数f(x)x3sinx1 的图象关于 _点对称答案(0,1)解析f(x)的图象是由yx3sin x的图象向上平移一个单位得到的11已知f(x)是定义在R上的偶函数,且对任意的xR,总有f(x2)f(x)成立,则f(19)_.答案0 解析依题意得f(x4)f(x2)f(x),即f(x)是以 4 为周期的函数,因此有
38、f(19)f(45 1)f(1)f(1),且f(12)f(1),即f(1)f(1),f(1)0,因此f(19)0.12定义在(,)上的函数yf(x)在(,2)上是增函数,且函数yf(x2)为偶函数,则f(1),f(4),f(512)的大小关系是_答案f(512)f(1)f(4)解析yf(x2)为偶函数yf(x)关于x2 对称又yf(x)在(,2)上为增函数yf(x)在(2,)上为减函数,而f(1)f(5)f(512)f(1)f(4)13(2011山东潍坊)定义在 R上的偶函数f(x)满足f(x 1)f(x),且在 1,0文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H
39、4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7
40、HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H
41、4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7
42、HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H
43、4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7
44、HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H
45、4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D67 上是增函数,给出下列关于f(x)的判断:f(x)是周期函数;f(x)关于直线x 1 对称;f(x)在0,1上是增函数;f(x)在1,2上是减函数;f(2)f(0),其中正确的序号是_答案解析由f(x1)f(x)得f(x2)f(x1)f(x),f(x)是周期为2 的函数,正确,f(x)关于直线x1 对称,正确,f(x)为偶函数,在 1,0 上是增函数,f(x)在0,1上是减函数,1,2上为增函数,f(2)f(0)因此、错误,正确
46、综上,正确三、解答题14已知f(x)是偶函数,g(x)是奇函数,且f(x)g(x)x2x 2,求f(x)、g(x)的解析式答案f(x)x22,g(x)x解析f(x)g(x)x2x2.f(x)g(x)(x)2(x)2.又f(x)为偶函数,g(x)为奇函数,f(x)g(x)x2x2.由解得f(x)x22,g(x)x.15已知f(x)是定义在R上的奇函数,且函数f(x)在0,1)上单调递减,并满足f(2 x)f(x),若方程f(x)1 在0,1)上有实数根,求该方程在区间1,3 上的所有实根之和答案2 解析由f(2 x)f(x)可知函数f(x)的图象关于直线x1 对称,又因为函数f(x)是奇函数,则
47、f(x)在(1,1)上单调递减,根据函数f(x)的单调性,方程f(x)1 在(1,1)上有唯一的实根,根据函数f(x)的对称性,方程f(x)1 在(1,3)上有唯一的实根,这两个实根关于直线x1 对称,故两根之和等于2.16已知定义域为R的函数f(x)2xb2x1a是奇函数()求a,b的值;()若对任意的t R,不等式f(t22t)f(2t2k)0 恒成立,求k的取值范围答案(1)a 2,b1(2)k13解析()因为f(x)是奇函数,所以f(0)0,即b 1a 20?b1 f(x)12xa2x1又由f(1)f(1)知12a4112a 1?a2.()解法一由()知f(x)12x22x 1,易知f
48、(x)在(,)上为减函数 又因f(x)是奇函数,从而不等式:f(t22t)f(2t2k)0 等价于f(t2 2t)k2t2.即对一切tR有:3t22tk0,文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6
49、P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档
50、编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6P9G2F9 ZL9N2S8H4D6文档编码:CL8M3E1B9D7 HF1O6