已知函数
.
(1)当
时,求
的最大值;
(2)当
时,求证:
(记
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5fd3930f9da12970ae166ebb6b1cb07.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3395c7415946c9beec09d7752650f826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2475513af67111df7a5d213692a474a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b4eae961232a89aa0680ea7422c80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c52da1246020bbb227cf9a3afac354f.png)
更新时间:2023-05-06 09:31:24
|
相似题推荐
解答题-问答题
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较难
(0.4)
【推荐1】已知函数
,设
为曲线
在点
处的切线,其中
.
(1)求直线
的方程(用
表示);
(2)求直线
在
轴上的截距的取值范围;
(3)设直线
分别与曲线
和射线
(
)交于
,
两点,求
的最小值及此时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8399f466be639dfa3e612466888b64a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35a8cdff7f5bfa2a7c9a13d20126e0c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28bb47982e7ef47c982071a70ffa60d.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46111e4d12c21798aa213c0d7804c2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48350c9f896c18a64f27867ca81c9be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac35b1e8a952aac4f4cdaaf02d868d04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
【推荐2】如图,湖中有一个半径为
千米的圆形小岛,岸边点
与小岛圆心
相距
千米,为方便游人到小岛观光,从点
向小岛建三段栈道
,
,
,湖面上的点
在线段
上,且
,
均与圆
相切,切点分别为
,
,其中栈道
,
,
和小岛在同一个平面上.沿圆
的优弧(圆
上实线部分)上再修建栈道
.记
为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/f40a4651-ca03-47ec-9dcf-cbace6611eb3.png?resizew=110)
用
表示栈道的总长度
,并确定
的取值范围;
求当
为何值时,栈道总长度最短.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/f40a4651-ca03-47ec-9dcf-cbace6611eb3.png?resizew=110)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e1d3f78a802596b825166767ceee40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7d5ef3a3d9a03be91135fc426d57cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f26c2ded122a46dd44b8d8b2740a4ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐1】已知函数
,
,
为
的导数,且
.证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
在
内有唯一零点;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
.
(参考数据:
,
,
,
,
.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78cfb9361b23e62c80cc5ce46519b42f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01b6fb6a1c7a895df528382a5583444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585de67a3fc494297d375d339af6d153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eac3b16d86d875dcfc2ff9f11baeec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d0cd47609b9d1865dfff4979161cf5.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c517bf0d1bd67fadcd69f1375b0243bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/157cff1b36a0f7aca3dd312330df74d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25170a7659aa7cb1ebdf013ed1299b80.png)
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您最近一年使用:0次
解答题-证明题
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较难
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【推荐2】已知函数
,
.
(1)讨论函数
的单调性;
(2)当
时,函数
有两个不同的零点
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ea400e6c5e28322f5b5c8f8522e1da8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc80fc6d83395bf479026a4726194653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/066bb2df7fb6ba52c87cbd293b0901e0.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐3】已知函数
.
(1)当
时,求曲线
在点
处的切线方程;
(2)若
在区间
上恒成立,求
的取值范围;
(3)试比较
与
的大小,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/333cdf841e9dedaac9b941150190d52d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9ede2e55724383dd1093fc7fcdb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03db4ea1dcb63b22cf4e917df5db581e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)试比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48dc1f6b3a2ae4903cca5d30a99edbb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
您最近一年使用:0次