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设函数f(x)是奇函数,并且在R上为增函数,若0≤θ≤时,f(msinθ)+f(...
设函数f(x)是奇函数,并且在R上为增函数,若0≤θ≤
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时,f(msinθ)+f(1-m)>0恒成立,则实数m的取值范围是( )
A.(0,1)
B.(-∞,0)
C.(-∞,1)
D.(-∞,
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)
考点分析:
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已知
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,
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,
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与
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的夹角为
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,如果
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,
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,则
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=等于( )
A.2
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B.
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C.
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D.
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在正方体ABCD-A
1B
1C
1D
1中,E为AA
1的中点,点P在其对角面BB
1D
1D内运动,若EP总与直线AC成等角,则点P的轨迹有可能是( )
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B.抛物线或其一部分
C.双曲线或其一部分
D.椭圆或其一部分
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已知函数y=f(x)满足:①y=f(x+1)是偶函数;②在[1,+∞)上为增函数.若x
1<0,x
2>0,且x
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B.f(-x
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C.f(-x
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D.f(-x
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给出下列命题:①“
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”是“
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”的充要条件;②“
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”是“
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”的充分不必要条件;③若O为坐标原点,点A的坐标为(2,-3),
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A.0
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