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定义在R上的偶函数y=f(x)满足f(x+2)=-f(x)对所有实数x都成立,且...
定义在R上的偶函数y=f(x)满足f(x+2)=-f(x)对所有实数x都成立,且在[-2,0]上单调递增,
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则下列成立的是( )
A.a>b>c
B.b>c>a
C.b>a>c
D.c>a>b
考点分析:
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下列说法错误的是( )
A.如果命题“¬p”与命题“p或q”都是真命题,那么命题q一定是真命题;
B.命题“若a=0,则ab=0”的否命题是:“若a≠0,则ab≠0”;
C.若命题p:∃x∈R,x
2-x+1<0,则¬p:∀x∈R,x
2-x+1≥0;
D.“
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”是“θ=30°”的充分不必要条件
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若f(x)=
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,则
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=( )
A.
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B.
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C.
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D.1
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要得到函数y=sin2x的图象,需要将函数
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的图象( )
A.向左平移
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231527888757370/SYS201311012315278887573006_ST/1.png)
B.向右平移
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C.向左平移
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设f(x)=|2-x
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A.(0,2)
B.(0,2]
C.(0,4]
D.(0,4)
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设函数f(x)=x
3+ax
2+(a+6)x+1,既有极大值又有极小值,则实数a的取值范围( )
A.a>6或a<-3
B.-3<a<6
C.a≥6或a≤-3
D.-3≤a≤6
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