(不等式选讲)
已知函数
,且不等式
的解集为
(其中
).
(1)求
的值;
(2)若
的图象恒在函数
的图象上方,求实数
的取值范围.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9cf4a67ff815149ee3a5582f1e0d46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab989f85a681b41c29465d4be74b789f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbcd727429a93a56ab520e4c5ed11d72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e68a83b4093280ea8750677f6828bf47.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6b13ab1bd9ad70e439933de02713a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1edab3256f67aaba352479b9b36189a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2017-11-12 11:00:44
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解答题
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适中
(0.65)
【推荐1】选修4-5:不等式选讲
设函数
.
(I)当
时,求函数
的最大值;
(II)若存在
,使得
,求实数
的取值范围.
设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6d5ce720a0667677b98bf7eef100c2.png)
(I)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdbf6506e9de40da0f3c51b81b35a901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(II)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799b324b514d6044672c133d8fef2dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9958560e80c661faf6ca8fb054a38790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解答题-问答题
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适中
(0.65)
【推荐2】已知实数
,函数
的最大值为
.
(I)求
的值;
(II)设函数
,若对于
,均有
,求
的取值范围.
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572663768809472/1572663774625792/STEM/61215781c648400185b87a249bfb2392.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572663768809472/1572663774625792/STEM/2f27b1475e2044a0b636e1e808953ac7.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572663768809472/1572663774625792/STEM/6c1209737ab5446f90ab2d0867fbd726.png)
(I)求
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572663768809472/1572663774625792/STEM/a0fd60c2d32a4ae8b907e9d5724194af.png)
(II)设函数
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572663768809472/1572663774625792/STEM/8e0a836a4f7746fc840a81b9410cebce.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572663768809472/1572663774625792/STEM/bdd5a8ea79384c9c9e5e4bdfbc5f96ed.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572663768809472/1572663774625792/STEM/87417e04ed114339aa8fe3d74feccd31.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572663768809472/1572663774625792/STEM/6bfdfc91d2d44114b6d03fb00b0a27ee.png)
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适中
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【推荐3】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99099e7beddc1966addc7e4d29d9b536.png)
(1)解不等式
;
(2)若关于
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在
上无解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99099e7beddc1966addc7e4d29d9b536.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00f78bc5234bf294884a2f5465ad2ff3.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afbdf30ab379a18ed1f2c3ab9d1ae6c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6bfefa5b41faae17987876d570685d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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适中
(0.65)
【推荐1】已知函数
.
(1)证明:
;
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93d4097c8537636cd77c26e6a93ec6fe.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b4a512c3dac716eaabc21d4d8aa7ad.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2bb9583433d8f3c1e690ab377493176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca97e3aa8061c4d8e621c5598c69b13b.png)
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您最近一年使用:0次
解答题
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适中
(0.65)
名校
【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf4f64534a7a220fcac4f7f931a0baee.png)
(Ⅰ)已知常数
解关于
的不等式
;
(Ⅱ)若函数
的图象恒在函数
图象的上方,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf4f64534a7a220fcac4f7f931a0baee.png)
(Ⅰ)已知常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55ef01e8878bb8939c5657025ec55294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b7829c0ec4d2abe0973e3b560e369.png)
(Ⅱ)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e03ad0c315806342d6cd732a0b91a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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