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一张正方形的纸片,剪去两个一样的小矩形得到一个“E”形图案,如图所示,设小矩形的...
一张正方形的纸片,剪去两个一样的小矩形得到一个“E”形图案,如图所示,设小矩形的长、宽分别为x、y,剪去部分的面积为20,若2≤x≤10,记y=f(x),则y=f(x)的图象是( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081004_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081004_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081004_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081004_ST/images3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081004_ST/images4.png)
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定义域为R的函数f(x)对任意x都有f(x)=f(4-x),若x∈[2,+∞)时,f(x)单调递增,则当2<a<4时,有( )
A.f(2
a)<f(2)<f(log
2a)
B.f(2)<f(2
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C.f(2)<f(log
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D.f(log
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已知函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081002_ST/0.png)
的最小正周期为π,将y=f(x)的图象向左平移|φ|个单位长度,所得图象关于y轴对称,则φ的一个值是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081002_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081002_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081002_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/20131103101017105808140/SYS201311031010171058081001_ST/0.png)
=(2,3),
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081001_ST/1.png)
=(-1,2),若m
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081001_ST/2.png)
+n
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081001_ST/3.png)
与
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081001_ST/4.png)
-2
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081001_ST/5.png)
共线,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081001_ST/6.png)
等于( )
A.-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081001_ST/7.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101017105808140/SYS201311031010171058081001_ST/8.png)
C.-2
D.2
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集A={a,b},B={-1,0,1},从A到B的映射f
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