已知函数
.
(1)当
有是实数解时,求实数
的取值范围;
(2)若
,对一切
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec1ce12c00ba3ca5341deafcf8ad8dc.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed9609b619e84816779fe9b5e8ad75d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2018-04-10 23:34:36
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解答题-问答题
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适中
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名校
【推荐1】已知函数
,
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(1)求函数
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(2)若
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(2)若
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您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
【推荐2】如图,设
是单位圆上一点,一个动点从点
出发,沿圆周按逆时针方向匀速旋转,12秒旋转一周.
秒时,动点到达点
,
秒时动点到达点
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(1)求点
的坐标,并求
;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d739fee59c1cb6ccc3ab337a7759b57e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d20b8319e8515f864de7b32bd90c69a.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c8ca569e742d9eeee3b85f61bd8e17.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3caa5aa89b6fd93bb777c9a8ec85cd3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e408814a3c407cce586f1e78fc0984.png)
![](https://img.xkw.com/dksih/QBM/2014/7/25/1571827937001472/1571827942965248/STEM/59a4a0c807504122ab3be08c8a98785a.png)
您最近一年使用:0次