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函数f(x)=2sin2x-1是( ) A.最小正周期为2π的奇函数 B.最小正...
函数f(x)=2sin2x-1是( )
A.最小正周期为2π的奇函数
B.最小正周期为π的奇函数
C.最小正周期为2π的偶函数
D.最小正周期为π的偶函数
考点分析:
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B.向右平移
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C.向左平移
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D.向左平移
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cos300°=( )
A.1
B.
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已知函数f(x)=sin(ωx+
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)(ω>0)的最小正周期为π,则该函数的图象( )
A.关于点(
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B.关于直线x=
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C.关于点(
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,0)对称
D.关于直线x=
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函数
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的定义域为( )
A.(0,+∞)
B.(1,+∞)
C.(0,1)
D.(0,1)∪(1,+∞)
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下列命题正确的是( )
A.若p为:∃x∈R,x
2+2x≤0,则¬p为:∀x∈R,x
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C.命题p为真命题,命题q为假命题.则命题p∧(¬q),(¬p)∨q都是真命题
D.命题“若¬p,则q”的逆否命题是“若p,则¬q”.
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