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已知函数f(x)是R上的偶函数,且在区间[0,+∞)上是增函数.令,则( ) A...
已知函数f(x)是R上的偶函数,且在区间[0,+∞)上是增函数.令
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,则( )
A.b<a<c
B.c<b<a
C.b<c<a
D.a<b<c
考点分析:
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的值域是( )
A.[-1,1]
B.
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C.
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D.
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定义运算
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,如
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,已知α+β=π,
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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.
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如图,平面内的两条相交直线OP
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=m
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A.m>0,n>0
B.m>0,n<0
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下列函数中周期为1的奇函数是( )
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个单位长度,再把所得各点的横坐标伸长到原来的2倍(纵坐标不变),所得图象的函数解析式是( )
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