設全集U=R,A=
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,則右圖中陰影部分表示的集合為 ( )
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,因為
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是增函數(shù),所以
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,故
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,
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陰影部分表示的集合為
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=
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R
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Z
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,則
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設集合
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(本小題滿分14分)
設集合
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,
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.
(1)若
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,求實數(shù)
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(2)求
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,
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.
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