已知命題
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函數(shù)
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是增函數(shù),命題
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,
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的導(dǎo)數(shù)大于0,那么 ( )
試題分析:函數(shù)
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時,
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在
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上恒成立,則
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在
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上是增函數(shù),故命題
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是真命題,所以
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是假命題。令
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,則
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,所以
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再其定義域上恒成立。故命題
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是假命題,所以
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是真命題。故D正確。
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:若
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; 命題
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:若
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,命題
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為
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為
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.則命題
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”是“
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③命題“若
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,則方程
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0”;
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.
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