已知
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd8c32b924b7b6c76cfd7a844fbb5e8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb8854f8437b8146a5ffc294ce3469d.png)
19-20高一·全国·课后作业 查看更多[3]
更新时间:2020-02-05 00:36:56
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】设函数
.
(1)当
时,求关于
的不等式
的解集;
(2)若
在
上恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ea7a6fc1c9d8a7b2b3e45005c2fb87.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e520c1ab44faaa476a5f3f6181db0f4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/236e55eade97d7add571b9530b41d271.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22df885f2f8a1eeb748cb3e035ad006b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-问答题
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适中
(0.65)
名校
【推荐1】已知函数
,且
.
(1)若
的解集为
,求函数
的值域;
(2)当
时,解不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0d36333e382a879e8aec8972184b00a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46305fedfb17a208a8b4cab7ebceddfc.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e73b7f86fbe5a4ea3de4715d25dab77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e82cc461b9607e08a8b31597f6d26df.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐2】设
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(1)若不等式
对一切实数x恒成立,求实数m的取值范围;
(2)在(1)的条件下,求
的最小值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c83b770039adb19a7391bd2c5ff0b1f.png)
(1)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e81ec33d981d98a0cfc1ad1b2998165.png)
(2)在(1)的条件下,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc8bc9af367dea42e36c92e4ef207dc.png)
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【推荐1】直线
过点
,且与
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轴正半轴分别交于
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(2)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6441395cf23aaa1c7a09d6fdbe242448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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适中
(0.65)
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解题方法
【推荐2】
ABC中,内角A,B,C所对边分别为a,b,c,
.
(1)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79f58ee901b9b2fcb8477ef79df5c404.png)
(1)求
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc7407d82d6e55b969d34e937ce36f3d.png)
您最近一年使用:0次