函数f(x)=
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的定义域为
.
考点分析:
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方程
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=k(k>0)有且仅有两个不同的实数解θ,φ(θ>φ),则以下有关两根关系的结论正确的是( )
A.sinφ=φcosθ
B.sinφ=-φcosθ
C.cosφ=θsinθ
D.sinθ=-θsinφ
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已知ω>0,函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102407951613124/SYS201311031024079516131010_ST/0.png)
在
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上单调递减.则ω的取值范围是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102407951613124/SYS201311031024079516131010_ST/2.png)
B.
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C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102407951613124/SYS201311031024079516131010_ST/4.png)
D.(0,2]
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函数:①y=x•sinx②y=x•cosx③y=x•|cosx|④y=x•2
x的图象(部)如下,但顺序被打乱,则按照从左到右将图象对应的函数序号安排正确的一组是( )
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A.④①②③
B.①④③②
C.①④②③
D.③④②①
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将函数y=sinx的图象上所有的点向右平行移动
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个单位长度,再把所得各点的横坐标伸长到原来的2倍(纵坐标不变),所得图象的函数解析式是( )
A.y=sin(2x-
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)
B.y=sin(2x-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102407951613124/SYS201311031024079516131008_ST/2.png)
)
C.y=sin(
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x-
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)
D.y=sin(
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x-
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)
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已知定义在R上的奇函数f(x),满足f(x-4)=-f(x),且在区间[0,2]上是增函数,则( )
A.f(-25)<f(11)<f(80)
B.f(80)<f(11)<f(-25)
C.f(11)<f(80)<f(-25)
D.f(-25)<f(80)<f(11)
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