已知
,
(1)求
的单调区间与最大值;
(2)是否存在正整数
,使得
,对一切
恒成立?若存在,求出
的最大值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455e11da99e74eed8b777828d10b31ca.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)是否存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b358670f9adb6e49ec427005fcb75474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2023-12-20 10:50:47
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相似题推荐
解答题-问答题
|
较难
(0.4)
名校
【推荐1】已知函数
.
(1)当
时,求曲线
在
处的切线方程;
(2)设函数
,求函数
的单调区间;
(3)若
,在
上存在一点
,使得
成立,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0b09dd514a9480879663ec033c7d53.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a55799f73da63d837714bec5574fe46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74314814cdc6fb803abb4692458af131.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9faf56bd86a9c745b7176c6c340bf576.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab14ea666fe26b220008c427406a0026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b9bfb5c6f9dbc1dc0727c8afeaef19.png)
求的取值范围.
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解题方法
【推荐2】已知函数
.
(1)求函数
的极值;
(2)设
,若对
都有
成立,求a的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d370618aa66cd572c36625f9b2059c5c.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af818fa22762a5dab64b00f05815289c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e339e977418dba3840c4f86f21ce9d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab42740d8f095b5f7825d14c4c312096.png)
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【推荐3】设函数
.
(1)求
的单调区间;
(2)设函数
,求
在
的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66134e2ddbd44bfab7b0422f282b5359.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0384a0466920e5bf00231a5c5bf77969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a8a4830a9a0993a0710edf448fe7521.png)
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较难
(0.4)
【推荐1】已知函数
.
(1)令
,若
在区间
上不单调,求
的取值范围;
(2)当
时,函数
的图象与
轴交于两点
,
,且
,又
是
的导函数.若正常数
,
满足条件
,
.试比较
与0的关系,并给出理由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8069113f5f6c47e4d72f2a3890af7d7e.png)
(1)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b9ff3088cf75d2c0723095b849155a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed18bd80c6c4142f68e89f4ad44570b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c6eeb6bb15ae0e58bd092d02a8b7624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ec3d75e53b990bc8f9a4622928dd21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b583230a32b774445332490c511989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d41acc47493556617fe7b9e55093d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80c74f26a5ce7e60722f034a7a2b8a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3999cdc37dd36b630ccfd72bd36e9f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ed6fa968a0b222c8bc02e413cd8d1cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/501cf3cab0fc9107c98fd8e5ead34dd7.png)
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【推荐2】已知函数
.
(1)讨论
的单调性;
(2)已知
存在两个极值点
,
,令
,若
,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2885542d532aed0a65d7a15e73f27c2c.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.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/fa1ee12fc96cf82d2ab7152f3b5d5faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f05595aa7994885ed05f1de0033da31a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9d3925e716be2c7ee2db027b9b2f96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐3】“得地率”是指可供人活动的区域的占地面积与总占地面积之比.“得地率”越高,也就意味着人们可活动的区域更大,因此在设计活动场地时,通常会将“得地率”作为一个重要的指标进行考虑.上海某大型购物商场欲将地下一层的一块半圆形空地改建为亲子乐园,建造一个供亲子游玩的海洋球池和两个供人们休息和娱乐,且大小完全相同的休息区.除海洋球池和休息区外的剩余空地全部用气垫筑起“高墙”,以保护亲子乐园中的人们.如图所示,设半圆形空地的圆心为
,半径为
,
为直径,矩形海洋球池
的顶点
在
上,顶点
在半圆的圆周上.矩形休息区
和
的顶点
在
上,顶点
在半圆的圆周上,顶点
分别在线段
上.已知
,设
,其中
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/af12af0c-395f-40b9-be6f-8965c23e30df.png?resizew=438)
(1)求当
时该亲子乐园可供人活动的区域面积
,并求出此时的“得地率”(结果精确到
);
(2)求当
为多大时,该亲子乐园的“得地率”最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc8cedba8cf78fb20381c72e9b5f6b06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1da2078b8e4cb44d7147917152d601e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7826f255c338257bb731c64c6f12ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c25cddba1adc4e38324a56dc50376a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46c696ff5f123a482bae81cf9a1b570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d777a41834c51955d719bd68e7bd45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11db4b9921a9fe4d5c03b17bafc852fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5a531329748ceebf20280835a4e60f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/af12af0c-395f-40b9-be6f-8965c23e30df.png?resizew=438)
(1)求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905dd10639c9fef5ef8d66a124756140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edb1e0c3e2fb29b0b35d51d22a5710d.png)
(2)求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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解答题-问答题
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较难
(0.4)
解题方法
【推荐1】已知函数
.
(1)若
,求以
为切点的曲线的切线方程;
(2)若函数
恒成立,确定实数
的取值范围;
(3)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf26d6efab7cc6cddd095453bb1b93e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e69866076dcff686a05e9e91e61e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c18a8b71a8ab3e115a2813eb72364c4f.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6acb0f1ac694dd177e99fc385f23318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59201dc7b471e8988d72125128063ec4.png)
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【推荐2】已知
.
(1)求函数
在定义域上的最小值;
(2)求函数
在
上的最小值;
(3)证明:对一切
,
都成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb3b6c56aee4bb8a8131fd960415c745.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce37d916f185cf89e4d2c35ef7c15d8.png)
(3)证明:对一切
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/513ddc07d9b763ed7e1c8055154b8183.png)
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