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已知f(x)是奇函数,且f(2-x)=f(x),当x∈[2,3]时,f(x)=l...
已知f(x)是奇函数,且f(2-x)=f(x),当x∈[2,3]时,f(x)=log2(x-1),则当x∈[1,2]时,f(x)=( )
A.-log2(3-x)
B.log2(4-x)
C.-log2(4-x)
D.log2(3-x)
考点分析:
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为了从甲乙两人中选一人参加数学竞赛,老师将二人最近6次数学测试的分数进行统计,甲乙两人的平均成绩分别是
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,则下列说法正确的是( )
A.
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,甲比乙成绩稳定,应选甲参加比赛
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<
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23和log
32,则输出M的值是( )
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A.0
B.1
C.2
D.-1
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已知点F
1(-4,0)和F
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B.
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