1 . 已知
,则
的值是
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572053551022080/1572053556658176/STEM/1d7e1b1bc84047afa960551548a3644a.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572053551022080/1572053556658176/STEM/50dba19300e24f1f99357248a988799d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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14-15高一上·贵州黔东南·期末
2 . 下列函数在区间
上为减函数的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e87cc1e6f5f6398c75fd42d0eabc749.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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14-15高一上·贵州黔东南·期末
3 .
的值等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d76d897816810273aa96311dfba8587.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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14-15高二上·贵州遵义·期末
4 . 已知函数
(
),
(0<x<4),
的图像所有交点的横坐标之和为__________ .
![](https://img.xkw.com/dksih/QBM/2014/7/23/1571822255906816/1571822261592064/STEM/3564f08b7a204f31b329fb8510304da6.png?resizew=84)
![](https://img.xkw.com/dksih/QBM/2014/7/23/1571822255906816/1571822261592064/STEM/0d4085afaacd439d9f1ee9a30278e422.png?resizew=45)
![](https://img.xkw.com/dksih/QBM/2014/7/23/1571822255906816/1571822261592064/STEM/db4b9c8d95ec444492ecf3a04851f68c.png?resizew=120)
![](https://img.xkw.com/dksih/QBM/2014/7/23/1571822255906816/1571822261592064/STEM/7b96e82c251845119dd7329a425777fa.png?resizew=129)
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5 . 设当x=θ时,函数f(x)=sin x-2cos2 x/2取得最大值_______ .
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6 . 已知
,
, 且
当
时,
的最小值是-4 , 求此时函数
的最大值___________ ,此时X=____________ .
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520595406848/1572520601567232/STEM/e95b7b3654444254a572955822d81acf.png?resizew=150)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520595406848/1572520601567232/STEM/dc381b7e52ce45b9ae5f78ad0f3d8f39.png?resizew=138)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520595406848/1572520601567232/STEM/66ff17df49194e91b861338dad25a3e1.png?resizew=71)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520595406848/1572520601567232/STEM/8eea878b6d374be79b0c2169d2a5be94.png?resizew=86)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520595406848/1572520601567232/STEM/a3d01bb17a514e06b0cce9df8cb1ad4c.png?resizew=34)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520595406848/1572520601567232/STEM/a3d01bb17a514e06b0cce9df8cb1ad4c.png?resizew=34)
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