已知
为二次函数,且![](https://img.xkw.com/dksih/QBM/2016/2/19/1572489322536960/1572489328762880/STEM/52684e3323bd4b2c8b02435e95bb3366.png)
(1)求
的解析式
(2)当
时,求
的最大值与最小值.
![](https://img.xkw.com/dksih/QBM/2016/2/19/1572489322536960/1572489328762880/STEM/8400e044f2e54b01b0665dcaac5895f1.png)
![](https://img.xkw.com/dksih/QBM/2016/2/19/1572489322536960/1572489328762880/STEM/52684e3323bd4b2c8b02435e95bb3366.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2016/2/19/1572489322536960/1572489328762880/STEM/8400e044f2e54b01b0665dcaac5895f1.png)
(2)当
![](https://img.xkw.com/dksih/QBM/2016/2/19/1572489322536960/1572489328762880/STEM/415f0e2799f9440bbdd1ef792171da7a.png)
![](https://img.xkw.com/dksih/QBM/2016/2/19/1572489322536960/1572489328762880/STEM/60b1bf0fab804d0cbd3e1b1382d14da1.png)
更新时间:2016-12-04 02:20:38
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【推荐1】已知函数
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【推荐2】环保生活,低碳出行,电动汽车正成为人们购车的热门选择.某型号电动汽车,在一段平坦的国道进行测试,国道限速.经多次测试得到,该汽车每小时耗电量
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0 | 10 | 40 | 60 | |
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为了描述国道上该汽车每小时耗电量与速度的关系,现有以下三种函数模型供选择:,
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【推荐1】已知二次函数
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【推荐2】(2011年苏州20)已知二次函数
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(1)证明:实数
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