已知函數(shù)
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,若
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,則
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的最大值為________.
試題分析:
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,
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,
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,當(dāng)且僅當(dāng)
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時,上式取等號,由于
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,即當(dāng)
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時,
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取最大值
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,
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,即
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的最大值為
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.
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