计算
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=
.
考点分析:
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100107496289332/SYS201311031001074962893012_ST/images0.png)
若全集U=R,A={x∈N|1≤x≤10},B={x∈R|x
2+x-6=0},则如图中阴影部分表示的集合为
.
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给出下列各题
(1)已知幂函数的图象经过点(9,3),则f(100)=10
(2)函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100107496289332/SYS201311031001074962893011_ST/0.png)
(3)
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100107496289332/SYS201311031001074962893011_ST/1.png)
(4)若函数f(x)=a
-x在R上是增函数,则a>1
(5)函数f(x)=x
2且x∈[-1,2],则f(x)是偶函数.
则以上结论正确的个数为( )
A.1
B.2
C.3
D.4
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当a≠0时,y=ax+b和y=b
ax的图象只可能是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100107496289332/SYS201311031001074962893010_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100107496289332/SYS201311031001074962893010_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100107496289332/SYS201311031001074962893010_ST/images2.png)
D.
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已知函数f(x)=-x
2+4x-3,x∈[0,m]且f(x)
max=f(m),则m的取值范围( )
A.m≥2
B.0<m≤2
C.m≤2
D.0≤m≤2
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已知函数y=f(x)是R上的偶函数,且f(x)在[0,+∞)上是减函数,若f(a)≥f(-2),则a的取值范围是( )
A.a≤-2
B.a≥2
C.a≤-2或a≥2
D.-2≤a≤2
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