已知函数
,
.
(1)求函数
的单调区间;
(2)当
时,
恒成立,求实数
的取值范围;
(3)当
时,求证:当
时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6438fd870167e19e720adcc7c7d7bade.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a262ee93e05410c37f1f91b6764f93b.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bc1807f5f5784e75c4e5e6df17f3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8e4b5cdc213bd6d1d8b617f038234c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302337058242c7b78e3eb4ac7210b7ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c6cf9152e0d02b83eb22b01722d29c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5c92795a43edb3b8cfcbaef3790b333.png)
更新时间:2018-05-30 14:29:47
|
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解答题-证明题
|
困难
(0.15)
名校
【推荐1】已知
,函数
.
(1)当
时,求
的单调区间;
(2)当
时,设
的导函数为
,若
恒成立,求证:存在
,使得
;
(3)设
,若存在
,使得
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73254f32b6da29ecc32df2e9f87a4c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9fef330410912ad36677dbf8549b7f7.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0953444691256f713639f4ded91ff306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990ea00761500cbd2a51283a2f443421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c72d250a079379c5175693c165248c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90f8f8ab529ff605ee0c00e551a01622.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14ae80746de8e491dcb8df4b1c42dbea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42fd7af568e3d9f444beb0ff41426477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/478052f005a72e660f55b439e77955dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c247baa451cd7868d97daa7103085ae.png)
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解答题-问答题
|
困难
(0.15)
【推荐2】已知函数
.
(1)若
,求
的单调区间;
(2)若
存在唯一的零点
,且
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520755dcf97723af83c534c68258d79e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee21db6628e4db3f5831370549fa96b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
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困难
(0.15)
【推荐3】已知函数
.(
为常数)
(1)当
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的单调增区间;②试比较
与
的大小;
(2)
,若对任意给定的
,在
上总存在两个不同的
,使得
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89a6eb1b39894b8a890caa51eeb5dce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f81f2a0196b06fc56a7e8a6463d179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5464b1d9d68fef5d73d760f72edac694.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c9615599de406eb9db709ef885529dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa8cc90b366efde0bb10652a58431e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742268e12c1dd269500286a8d35e3b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281106d1eb0462759ab01d17ba958a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31296474ad150954afd21b32d71d81c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
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困难
(0.15)
名校
【推荐1】已知函数
.
求
的单调区间和极值;
当
时,证明:对任意的
,函数
有且只有一个零点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1685f4d35ae1a076ae0fb74988ec8e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c13a09123ae873e0b0501aaecc507e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5036e26e77152eb05955d2aceca93950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2021d761480a8b3b1a8ab5da8c505cca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16635273b7dfaaf3b4c86594420c6e77.png)
您最近一年使用:0次
解答题-问答题
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困难
(0.15)
名校
解题方法
【推荐2】设函数
.
(1)探究函数
的单调性;
(2)若
时,恒有
,试求
的取值范围;
(3)令![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ebf0ae3785ad5f33980b9b117d8b16.png)
,试证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e37e0f8994d75086f9f10a818d2ccda.png)
(1)探究函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb788ae88e457017bb81120b6a2e5ee.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e80fe5534b57c7a051fc462b9e889f6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ca5c0661eeaa11189270ab02f241c70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ebf0ae3785ad5f33980b9b117d8b16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/914e37f968b2c4adfddc1187d3cf70cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de597059f9a546c77744f2532dd33e31.png)
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解答题-问答题
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困难
(0.15)
【推荐1】已知函数
.
(1)求曲线
在点
处的切线方程;
(2)若函数
有两个零点
,
(其中
).
(i)求实数
的取值范围;
(ii)若存在实数
,当
时,使不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/803afa3c30a4eb1a39425e44eca98cca.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0707344f1985c614bb00db33a467c9ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
(i)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(ii)若存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c84ab2ea2de85f4211d3b3aaee9fc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb06adbe9ec73cfc5a0664422d41a00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
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困难
(0.15)
【推荐2】已知函数
.
(1)当
,且
时,试求函数
的最小值;
(2)若对任意的
恒成立,试求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e63e8e00a8852a2fe7de321f258b5d4.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f702fdc92c78d14bfb2bdb69c53b67a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3a34d6f60032718820c3da2b07786b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46590444f6484448851a92e5ee0dfc86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次