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1 . 设
(
R)
(1) 若
,求
在区间
上的最大值;
(2) 若
,写出
的单调区间;
(3) 若存在
,使得方程
有三个不相等的实数解,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd4c1cd356731fb8defe81a11b5b9ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb71310ec267ea2c2fc0ccaeb2343d0.png)
(1) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fab11f38ab8593932082ec4d9c8c91f.png)
(2) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3) 若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cfed3b23a41131d4d9ecc98e5dffa51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53400bd668c66b0ebe933c3ce329832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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2017-11-15更新
|
1058次组卷
|
5卷引用:江苏省扬州市邗江区公道中学2017-2018高 一第二次学情测数学试题
名校
解题方法
2 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/511b5e2d1629ade61c3be1a881f7b8a7.png)
,
(1)当
时,求
在区间
上最大值和最小值;
(2)如果方程
有三个不相等的实数解
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/511b5e2d1629ade61c3be1a881f7b8a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e5ff2705eb737adef9a6dc70559d79.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f409d09ee4c68dd167d9dc62dd58a4.png)
(2)如果方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52079d948ae0e1f1d112b3ac76142f1a.png)
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16-17高一下·上海·期中
名校
3 . 已知方程
;
(1)若
,求
的值;
(2)若方程有实数解,求实数
的取值范围;
(3)若方程在区间
上有两个相异的解
、
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75c67d6820f3ed894bbe6eaa15801f1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77d3f64e95f770314b43c7d121f381b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8814524833190bbf1bb30e9571b7615a.png)
(2)若方程有实数解,求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若方程在区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87496e75a3fa21d4a5c85ddd6b674c1a.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/b8dc4c63a548b91061528aa11058de75.png)
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4 . 函数
在一个周期内的图象如图所示,A为图象的最高点,B、C为图象与x轴的交点,且△ABC为正三角形.
(1)求
的值及函数
的值域;
(2)若
,且
,求
的值;
(3)将函数
的图象上各点的纵坐标变为原来的
倍,横坐标不变,再将所得图象各点的横坐标变为原来的
倍,纵坐标不变,最后将所得图象向右平移
个单位,得到
的图象,若关于
的方程
在区间
上有两个不同解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14e16e07669e95ea326ff037c4c5db5c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed3f0c5b41b4ae5373994d114b7a567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f524442daa200dc136dfbb50e8aeaf3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e9da6aa2726279d243064ad3687358.png)
(3)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a8b76e36783a69d14ec54af82c7df0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc1d7ad8216fa41c46ca8bd777b0af3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1613d377a07850c72cbec354b7a3000f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://img.xkw.com/dksih/QBM/2017/5/5/1683351420043264/1737964532367360/STEM/06ad138eec0c4d0cb1f576cee32e2b15.png?resizew=221)
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12-13高二下·福建泉州·期中
5 . 已知定义在区间
上的函数
的图象关于直线
对称,当
时,函数
,其图象如图所示.
![](https://img.xkw.com/dksih/QBM/2013/5/10/1571210464903168/1571210470400000/STEM/2375d990dc154cfc904a813b23965de4.png)
(Ⅰ)求函数
在
的表达式;
(Ⅱ)求方程
的解;
(Ⅲ)是否存在常数
的值,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7863e695698137039a1e73ec437fc2ad.png)
上恒成立;若存在,求出
的取值范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea5535a625f49d7d0ad3a981dc463637.png)
![](https://img.xkw.com/dksih/QBM/2013/5/10/1571210464903168/1571210470400000/STEM/d974b130da0b40d697be294f948d6515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26718af84fe8d35608797711e21b2ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfde81fc270087e6ddd8c09c5ade26cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed23ce3c25da404f800b1037d9d9142.png)
![](https://img.xkw.com/dksih/QBM/2013/5/10/1571210464903168/1571210470400000/STEM/2375d990dc154cfc904a813b23965de4.png)
(Ⅰ)求函数
![](https://img.xkw.com/dksih/QBM/2013/5/10/1571210464903168/1571210470400000/STEM/d974b130da0b40d697be294f948d6515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/479242602cba99a8093240ddd4b50f33.png)
(Ⅱ)求方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1900ff6726a9f7e247e1813409a07f3e.png)
(Ⅲ)是否存在常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7863e695698137039a1e73ec437fc2ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb1ac0a730a136aec96f58bdc8bf510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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9-10高二下·广东潮州·期中
6 . 已知
,函数
.
(1)若函数
在区间
内是减函数,求实数
的取值范围;
(2)求函数
在区间
上的最小值
;
(3)对(2)中的
,若关于
的方程
有两个不相等的实数解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c314267dc3afe0632756a47ac5f1c4e7.png)
(1)若函数
![](https://img.xkw.com/dksih/QBM/2010/7/16/1569791762767872/1569791768461312/STEM/14c36ea4aaa3444b8024b038d99de44c.png?resizew=35)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fcec77177443519207ffc6afb988d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1756b564bf1d998d8179637011c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a90170d7ef5ff6d1d63517c166f7a9.png)
(3)对(2)中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a90170d7ef5ff6d1d63517c166f7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5920533acc1467caaccd2be000ddeab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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7 . 设函数
.
(1)当
,
时,求函数
的单调区间;
(2)令
(
)其图象上任意一点
处切线的斜率
恒成立,求实数
的取值范围;
(3)当
,
时,方程
在区间
内有唯一实数解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cb20b5898c5ac5ffa1a3138e7ed74e8.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/624fac9fb9981309c6a5e2d07686a120.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0d9e40be9c8dc27e62d7ab9bdc8959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf0d139c9810361b4971904a943856b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96fbbb9c4b0f7937c003ef2c218c02a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86304c3e26200299a0480641525a283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/330aac4d09c91db1b636cfb3d819ac67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf613d5ed2a4b75ee70638f28fd9f44f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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10-11高二下·浙江嘉兴·期中
名校
8 . 设函数
.
(1)求
的单调区间;
(2)当
时,若方程
在
上有两个实数解,求实数
的取值范围;
(3)证明:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8b2498cc8d16d541af5c040f86ea25.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976d18a5396ba232f0aa38d136f1d749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc548dc9512f29922c422da279b3de18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66eba129d92ede31b728e2590c4db2a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e84757ffc2970361793a962d20eb026.png)
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解题方法
9 . 已知
.(1)求函数
的单调区间;
(2)若关于
的方程
有实数解,求实数
的取值范围;
(3)当
时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5220c1d29955df47343122a463c46a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b29a7faa14a6e09d0db2d04f4ced03.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96d463acffeab1dce5975244ae2d4f4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/576ea0f23e66276d14e99a90c149c0dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b952673e7c4e687e413df22a4622d9a5.png)
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2014高三·全国·专题练习
10 . 已知函数f(x)=ax3-3ax,g(x)=bx2+clnx,且g(x)在点(1,g(1))处的切线方程为2y-1=0.
(1)求g(x)的解析式;
(2)设函数G(x)=
若方程G(x)=a2有且仅有四个解,求实数a的取值范围.
(1)求g(x)的解析式;
(2)设函数G(x)=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277645d8df3380cb585c021ca783831c.png)
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