已知函数
.
(1)
为正实数,若
在
上恒成立,求
的取值范围;
(2)证明:当
时,有
成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09964f607641b3aa8b24d2288ef916e1.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/351a282cf4bde27e62660f9a694ef6df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279ed4abd1128ba934ec10df2b19eb98.png)
20-21高二上·黑龙江大庆·期末 查看更多[2]
更新时间:2021-01-09 16:32:29
|
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解答题-证明题
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困难
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解题方法
【推荐1】已知函数
.
(1)若
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(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da3209dff6bbdde2d918e9a8451ec7bf.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a7285dc5997e188d4ab024c29383e7.png)
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解答题
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困难
(0.15)
【推荐2】已知函数
.
(1)当
时,讨论函数
在区间
上零点的个数;
(2)证明:当
,
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c6f31696d83f13224b46735b8b5dab.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef118cce5443a4d794561f5ef8e1fcc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/918a513d84efa8d10c54e4686fe54b9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0beae1dd5c28f22f22f5fd2172a0de6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b61adc4745f283e4072ddd762f92ffe.png)
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【推荐1】已知函数
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(1)当
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(2)讨论函数
的单调性;
(3)若
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,且
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97227e82a644fdaa750975fbab2be46f.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d98919b1335a8b7ca020636d1494ad0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a844b9c0d7ea04428d8ba115709d9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
【推荐2】设
,曲线
在点
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垂直.
(1)求
的值;
(2)若对于任意的
,
恒成立,求
的取值范围;
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/613decb3b6a48dcc5ed9cd11412bc32c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8a3365e99f926b1dafa901ab232152.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4318a47d7e83d587e74bab4d3d1f6883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0519ca67eb9570d0c256affadb48eec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf4f665589ad79bc9ecd3fdf382d356.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
解题方法
【推荐3】函数
.
(1)若曲线
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处的切线与
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的取值 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcced80f281708c08edd80de37574ec3.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b29a7faa14a6e09d0db2d04f4ced03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d1599fec12720435a6d319984a10e2.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/396a1e488ef539bb911acd5b07d130b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd64942123663dd1f4565ced4ed3578b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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