1 . 定义
,已知
,
,
,函数
.
(1)求函数
的解析式;
(2)若函数
的图象与
轴的正半轴有两个不同交点
,
,且这两个交点的横坐标分别为
,
.
(i)求实数
的取值范围;
(ii)求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/478e75f2162f25b93d4c337e2829fc05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07f343ab89b0378d05dcbf475b6e21d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f27a9e9be7b2d16f2eac6f3fa63096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b97b295f88972ba1c7e3cefda0885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e14d82de4864f4cc2f74249ecf5cbffa.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e915b67f8f747698b8b46d37bc453667.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e915b67f8f747698b8b46d37bc453667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
(i)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(ii)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20fef976a0230bdfe3bc758e93987ba8.png)
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解题方法
2 . 某城市公园有一如图所示的绿化带,其形状由一个直径为
的半圆
和矩形
组成,其中
.管理部门规划在圆心
处建造一个亭子,为了方便游客到亭子游玩,决定从A地出发修建一条经过亭子
处到达
的公路,具体路线是:在半圆
上选点
(异于
,
点),从点
沿圆弧到点
,再从点
经过亭子
的直线到达
边上的点
处.已知从点
到点
的修路费用每千米需要
元,从点
到点
的修路费用每千米需要
元,设
弧度,从
地经点
,
到
地修路所需费用为
元.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/174f2b91-c470-4045-8e59-b291190728e3.png?resizew=144)
(1)试将
表示为
的函数
,并写出定义域;
(2)当
取何值时,修路所需费用最少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26016c9a610be4da74086a37c3327d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61322bc59ed9c2419acf31d42ce4d17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2564bf6e8c421b22dfb26f6837ede1e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09bd4c637c65384d1a8138e42d31641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f5a953038f38cce86187f1619f6876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/174f2b91-c470-4045-8e59-b291190728e3.png?resizew=144)
(1)试将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96eecf3f5484148eddcae82248dc1fa4.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
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3 . 已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffdaf6ce8c6055355f8904726b311df.png)
(1)直接写出曲线
与曲线
的公共点坐标,并求曲线
在公共点处的切线方程;
(2)已知直线
分别交曲线
和
于点
,
.当
时,设
的面积为
,其中O是坐标原点,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc873fc03e6e4d3c4ba02f8b1147b20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffdaf6ce8c6055355f8904726b311df.png)
(1)直接写出曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b53b86bd516400d6fa7dabb3603f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.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/eb095e9f5abae37f91650bb8d751a977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9768bacd90ba3b23403f0449c44e822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9768bacd90ba3b23403f0449c44e822.png)
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2021-11-04更新
|
617次组卷
|
3卷引用:北京市海淀区2022届高三上学期期中练习数学试题
2021高二·全国·专题练习
解题方法
4 . 已知f'(x)为函数f(x)的导函数,f'(x)=3x2+6x+b,且f(0)=0,若g(x)=f(x)﹣2xlnx,求使得g(x)>0恒成立b的值可能为( )
A.﹣2ln2﹣![]() | B.﹣ln2﹣![]() | C.0 | D.ln2﹣![]() |
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名校
解题方法
5 . 某广场一雕塑造型结构如图所示,最上层是一呈水平状态的圆环,其半径为
,通过金属杆
,
,
,
支撑在地面
处(
垂直于水平面),
,
,
是圆环上的三等分点,圆环所在的水平面距地面
属杆
,
,
所在直线与圆环所在水平面所成的角都为
.(圆环及金属杆均不计粗细)
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710163069018112/2798947815768064/STEM/21808899dc1041548d9a25a6be5d21c5.png?resizew=156)
(1)当
的正弦值为多少时,金属杆
,
,
,
的总长最短?
(2)为美观与安全,在圆环上设置
,
,…,
个等分点,并仍按上面方法连接,若还要求金属杆
,
,
,…,
的总长最短,对比(1)中
点位置,此时
点将会上移还是下移,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71a41641aa0d0e45a3c03d3d2c1196b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabe764f05300ac83c7d16b685d27af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae3a47e231dcbb00667109b40722bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/287d8edca8efb868f5233c19e2e9edb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b56e44e4f0424a2b7a45567120a2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167e6e41ac221847824a72e964f340f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabe764f05300ac83c7d16b685d27af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae3a47e231dcbb00667109b40722bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/287d8edca8efb868f5233c19e2e9edb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710163069018112/2798947815768064/STEM/21808899dc1041548d9a25a6be5d21c5.png?resizew=156)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabe764f05300ac83c7d16b685d27af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae3a47e231dcbb00667109b40722bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/287d8edca8efb868f5233c19e2e9edb0.png)
(2)为美观与安全,在圆环上设置
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1093302106aaafb7e197d06fefd01125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabe764f05300ac83c7d16b685d27af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae3a47e231dcbb00667109b40722bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5079f6411c584d0601ab83ca8dea00d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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解题方法
6 . 已知函数
,对任意的
,都有
成立,则实数
的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a3f8487b1b3166f026b931ceace6317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5365c0320ce96c64a49812c73e5a8fb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6154e00013d9dee84c0e941f676ea9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2021-08-27更新
|
627次组卷
|
3卷引用:吉林省延边第二中学2020-2021学年高二下学期期中考试数学(理)试题
解题方法
7 . 试写出一个实数a的值,使得关于x的不等式
恒成立:___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2893fd92b6d135dd739330d3cdc265d5.png)
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2021-08-26更新
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208次组卷
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2卷引用:江苏省南通市海安市南莫中学2020-2021学年高二下学期期中数学试题
名校
解题方法
8 . 已知
,其中e是自然对数的底数,则下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d582d3368765dfed097814378ff9063.png)
A. ![]() | B.![]() |
C.函数![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2021-08-15更新
|
374次组卷
|
2卷引用:江苏省常州市2020-2021学年高二下学期期中数学试题