1 . 已知函数
,
.
(1)求函数
的单调区间;
(2)若函数
有两个不同的零点
,
,
(i)求
的取值范围;
(ii)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3cc1f62def20b2ea753ba697ab168b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
(i)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(ii)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c3e017be5897d837ebac9c7a6af2728.png)
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3卷引用:天津市七校2020-2021学年高三上学期期末联考数学试题
2 . 已知函数
,
,
(1)求
的单调区间;
(2)若函数
在区间
上单调递增,求
的取值范围;
(3)若直线
是曲线
的切线,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a27aea66daa96c2d48a0f72c9b58d9d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773c161ced67198c0ef7d2fe2223edae.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa662f0273f0921c1fa4727f632395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
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名校
解题方法
3 . 设函数
,其中
﹒
(1)若
,求
的单调区间;
(2)若
,且
,
恒成立,求
的取值范围﹒
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6249abccfce46b35ab6b77d75920ead1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b97b295f88972ba1c7e3cefda0885d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e1721a86ad11b90bd646647e69eb58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e81b4aac721bcd4a49593b48a28a8f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2卷引用:天津市部分区2021-2022学年高三上学期期中数学试题
12-13高三·四川成都·开学考试
名校
4 . 已知函数
.
(Ⅰ)当
时,求函数
的单调区间;
(Ⅱ)当
时,不等式
恒成立,求实数
的取值范围.
(Ⅲ)求证:
(
,
是自然对数的底数).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31218292b46b3acd5a1792f526ee3ddf.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e64dcf4e2bbb48cd7e199a9ea951823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6bfdb24ecf5da863405c2b40936ff9.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2188e898a6af08a1e4f4001001194bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e36ebd09690ad6024b2fa0390595a39b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅲ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe59973991e53f006b2ec7f01b608957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8c29b297e3ec337c3139c2a1ebed1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
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5卷引用:天津市第一中学2020-2021学年高二下学期期中数学试题
天津市第一中学2020-2021学年高二下学期期中数学试题【全国百强校】天津市第一中学2017-2018学年高二下学期期中考试数学(理)试题(已下线)2014届四川省成都外国语学校高三开学检测理科数学试卷(已下线)2014届甘肃省张掖市第二中学高三11月月考理科数学试卷湖北省武汉市硚口区2022届高三下学期5月训练数学试题
名校
5 . 函数
的图象大致为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d692ef3570b9c09439a704ed0a23b40.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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3卷引用:天津市西青区张家窝中学2021-2022学年高三上学期第一次月考数学试题
解题方法
6 . 已知函数
.
(1)当
时,求函数
的单调区间和极值;
(2)若函数
在
上单调递减,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab8f98c9c8e0bee1667858f9cc33d302.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5511a368692de27c58ec48ce968de4a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
解题方法
7 . 已知函数
且
,则下列结论中正确的是( )
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11b92579e44c7598b74ee4bcd072464.png)
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f38d6d98451fbc2c8b6ce53749954c.png)
③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b6fbd08afa059e0fd6196f6a5b8c31.png)
④当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a987988419ae45872a4bc96ac0a8d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c7ed99a74e126a05cb520f19c094020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d41acc47493556617fe7b9e55093d10.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11b92579e44c7598b74ee4bcd072464.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f38d6d98451fbc2c8b6ce53749954c.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b6fbd08afa059e0fd6196f6a5b8c31.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f69a342a10eb6147acd4d4f6a49dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a987988419ae45872a4bc96ac0a8d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
A.①②③ | B.②④ | C.①③④ | D.①④ |
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2卷引用:天津市北辰区、津南区四校2020-2021学年高二下学期期末联考数学试题
名校
8 . 已知函数
.
(1)当
时,直线
与
相切,求
的值;
(2)若函数
在
内有且只有一个零点,求此时函数
的单调区间;
(3)当
时,若函数
在
上的最大值和最小值的和为1,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af854afdaeab1888201c9f7bd865f2e3.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f08ce80e91fdf435a8e3ec05be990e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c3737abcf4f34d13876b2b957978a40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d188ec2580e273ce87e51653a2177ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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4卷引用:天津市第十四中学2021届高三下学期开学考试数学试题
名校
9 . 关于函数
有下述四个结论:
①
是偶函数;②
在区间
单调递增;③
有4个零点;④
的最小值为
.
其中所有正确结论的编号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/518e26f8dc5bbbf32cd8005c962ed8ed.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
其中所有正确结论的编号是( )
A.①③④ | B.②④ | C.①④ | D.①③ |
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2卷引用:天津市滨海新区泰达一中(滨海高新技术产业开发区第一学校)2020-2021学年高二下学期期末数学试题
名校
10 . 已知函数
,
.
(1)若
,求函数
的单调区间;
(2)若
,求函数在区间
的最值;
(3)若
恰有三个零点,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490cbc2f6ebcd37b80c2824a8b023b16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b624d88827e92e12bc0a8f1067cbe72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2850764459f4cca23c9c21fe1d8879f7.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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