解题方法
1 . 已知函数
.
(1)当
时,证明:
是增函数.
(2)若
恒成立,求
的取值范围.
(3)证明:
(
,
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202753277c13024f87225c5b36dc72fe.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c7572463225bb3b65cb371f4496440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fd1360e5adc18f9007824381d8bc4e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac69e6db1df13ed64756b4f391ae9fac.png)
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2024高三·全国·专题练习
2 . 已知函数
.
(1)求
的单调区间;
(2)记
为
的从小到大的第
个零点,证明:对一切
,有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8555a5cb8471a886cf69acfbe69836f1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ea8f47d8d8d9e1832d52b1c7425450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4449a90ba861c85400a78b428c23bd5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec664c38448edaaf4d7edb034bb341e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b269ded4846157a058cff24edc65271.png)
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3 . 若函数
在
上有定义,且对于任意不同的
,都有
,则称
为
上的“k类函数”.已知函数
.
(1)求曲线
在点
处的切线方程;
(2)求
的单调区间;
(3)若
为
上的“3类函数”,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4776c85b79df196f606d3ebf3697fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d6fe21d6ed78bfc1d2b9cc41a766c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeaea651d833a0fd5a2a7f0cbaeb4ae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4776c85b79df196f606d3ebf3697fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/485825faa883e045117e914fc4094908.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da34ce730f711c09909d53806fe2330a.png)
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2024高三下·全国·专题练习
4 . 已知函数
,
时,
,则实数
的范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be8ab89740fb4824f71585d2e6b89067.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e17a5a943abe5c2c204a0946a1ed7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2024高三·全国·专题练习
解题方法
5 . 已知在
与
中,
与
在直线
的同侧,
,直线
与直线
交于
.
(1)若
,求
的取值范围;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44c80255f2108d8269d194d4429631b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229231951cc4217c7ceb0c3f31aed8e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b9624c8bc1f3da411108d04425ebcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d51b514868c66a72cb8a4c84d92c05d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe7b5ca0aba47ea8ce54eee2fc34c673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c51a8b483d4d31ed12e029d495b5192.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6930830ac55bda0aa0f2a1affb7ab11.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3df381cb4a4f2288b4d7f41495e9dd.png)
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2024高三·全国·专题练习
6 . 已知平面向量
.若对区间
内的三个任意的实数
,都有
,则向量
夹角的最大值的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24151df20746830cd7c540198c1795d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e66131f9839e54174fc403f4490438b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/096820d860ddf8f3155bf36f5fded491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5866c60e64cfde38a71c72932422a09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96445235e1596e6378fd02b2a3e5f2fc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024高三·全国·专题练习
解题方法
7 . 已知函数
,
为
的导数.若
时,
,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb444fe87941bcd1c91adb60a14b796b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5241746e4c300cc6ce6f67ef25b71e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b06282ad603b7a56f22bb084ecc365aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27794407a3d82a6746f7e0871051f486.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa96f3b9e5532397007d9c5e7ac78edc.png)
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2024高三·全国·专题练习
解题方法
8 . 已知当
时,
恒成立,若
是
的极大值点,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca542e78b7d77d008c9c4752afa91a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7552a9166b5242bc9bf777cc859c20a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b144bc49aebea25b699f42c532f65367.png)
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2024高三·全国·专题练习
9 . 已知双曲线
:
和椭圆
:
.过点
的动直线
交
于A,B两点,过点Р的动直线
交
于M,N两点,若四条直线
的斜率之和为定值,则定点Q为_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1892b7c3cd7bea116f532f66fba44662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f13bf66fc845b115de4ec45b4be0e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30a714873b3c65e7c3a6ad802fa7095e.png)
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名校
10 . 已知函数
.
(1)当
时,证明:
;
(2)当
时,
,求
的最大值;
(3)若
在区间
存在零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fb69579884d02df940d0ee1577b5e1a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf9e6bfd0a580544713a59ed282bfe4a.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213f600bc788894ff91df0356abb84f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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