计算:
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.
考点分析:
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已知函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102407951900870/SYS201311031024079519008011_ST/0.png)
,若f(m)=3,则实数m的值为
.
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当a>0且a≠1时,函数f (x)=a
x-2-3必过定点
.
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对于集合M、N,定义M-N={x|x∈M,且x∉N},M⊕N=(M-N)∪(N-M).设A={y|y=x
2-3x,x∈R},B={y|y=-2
x,x∈R},则A⊕B=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102407951900870/SYS201311031024079519008009_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102407951900870/SYS201311031024079519008009_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102407951900870/SYS201311031024079519008009_ST/2.png)
D.
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函数y=f(x)在[0,2]上单调递增,且函数f(x+2)是偶函数,则下列结论成立的是( )
A.f(1)<f(
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)<f(
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)
B.f(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102407951900870/SYS201311031024079519008008_ST/2.png)
)<f(1)<f(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102407951900870/SYS201311031024079519008008_ST/3.png)
)
C.f(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102407951900870/SYS201311031024079519008008_ST/4.png)
)<f(
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)<f(1)
D.f(
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)<f(1)<f(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102407951900870/SYS201311031024079519008008_ST/7.png)
)
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已知函数f(x)=e
x-1,g(x)=-x
2+4x-3,若有f(a)=g(b),则b的取值范围为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102407951900870/SYS201311031024079519008007_ST/0.png)
B.(2-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102407951900870/SYS201311031024079519008007_ST/1.png)
,2+
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)
C.[1,3]
D.(1,3)
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