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已知a=0.70.2,b=log0.22,c=20.7,将a,b,c由大到小的顺...
已知a=0.70.2,b=log0.22,c=20.7,将a,b,c由大到小的顺序排列 .
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,那么cos(
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曲线y=x
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对于函数f(x),若存在区间M=[a,b](其中a<b),使得{y|y=f(x),x∈M}=M,则称区间M为函数f(x)的一个“稳定区间”.给出下列4个函数:①f(x)=(x-1)
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;④f(x)=e
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B.①②③④
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D.①②③
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函数
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向左平移m(m>0)个单位后所得到的图象关于原点对称,则m的最小正值是( )
A.
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B.
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C.
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D.
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已知向量
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,
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不共线,且
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=
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+4
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,
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=-
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+9
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,
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=3
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-
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,则一定共线的三点是( )
A.A,B,D
B.A,B,C
C.B,C,D
D.A,C,D
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