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已知定义域为R上的函数f(x)满足f(2+x)=-f(2-x),当x<2时,f(...
已知定义域为R上的函数f(x)满足f(2+x)=-f(2-x),当x<2时,f(x)单调递增,如果x1+x2<4,且(x1-2)(x2-2)<0,则f(x1)+f(x2)的值( )
A.可能为0
B.恒大于0
C.恒小于0
D.可正可负
考点分析:
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,则
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的最大值为( )
A.-1
B.0
C.3
D.4
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函数y=
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的图象大致是( )
A.
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B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751009_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751009_ST/images3.png)
D.
查看答案
将函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751008_ST/0.png)
的图象上所有的点向左平移
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751008_ST/1.png)
个单位长度,再把图象上各点的横坐标扩大到原来的2倍,则所得的图象的解析式为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751008_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751008_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751008_ST/4.png)
D.
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若椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751007_ST/0.png)
过抛物线y
2=8x的焦点,且与双曲线x
2-y
2=1有相同的焦点,则该椭圆的方程为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751007_ST/1.png)
B.
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C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751007_ST/3.png)
D.
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已知向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751006_ST/0.png)
,
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满足|
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|=1,|
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+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751006_ST/4.png)
|=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751006_ST/5.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751006_ST/6.png)
,则|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751006_ST/7.png)
|=( )
A.2
B.3
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102320118675138/SYS201311031023201186751006_ST/8.png)
D.4
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