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函数f(x)=(m-1)x2+2(m+1)x-1的图象与x轴只有一个交点,则实数...
函数f(x)=(m-1)x2+2(m+1)x-1的图象与x轴只有一个交点,则实数m的取值集合是 .
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下列命题中,不正确命题的序号为
.
①f(x)=
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与g(x)=
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是同一函数;
②定义域为R的函数f(x),若f(2)>f(1),则函数为R上的增函数;
③函数
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在其定义域上为减函数;
④函数
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在其定义域上为增函数.
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已知
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,则下列正确的是( )
A.奇函数,在R上为增函数
B.偶函数,在R上为增函数
C.奇函数,在R上为减函数
D.偶函数,在R上为减函数
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已知函数f(2
x)的定义域[1、2],则f(log
2x)的定义城是.( )
A.[0、1]
B.[1、2]
C.[2、4]
D.[4、16]
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已知偶函数f(x)在区间[0,+∞)单调增加,则满足f(2x-1)<
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的x取值范围是( )
A.(
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,
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)
B.[
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,
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)
C.(
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,
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)
D.[
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,
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)
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