设
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,函数

的最大值为1,最小值为

,常数

的值是_____________.
令
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得
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或

,
当
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时,
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;当

时,

;当

时,

.
故函数有极大值

,极小值

,
又
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,
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,由于
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,∵
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,
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,又

,故

最大值为

,
同理,

,故最小值为

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