1 . 已知函数
.
(1)求函数
的单调减区间;
(2)设
,求证:函数
在
上有唯一零点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7029bd8089800bab0111238b4ed8b38.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcfac854561d24d839fe961dd89ebd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e1c9c97de9198d47306216e9961b80.png)
您最近一年使用:0次
名校
解题方法
2 . “切线放缩”是处理不等式问题的一种技巧. 如:
在点
处的切线为
,如图所示,易知除切点
外,
图象上其余所有的点均在
的上方,故有
. 该结论可通过构造函数
并求其最小值来证明. 显然,我们选择的切点不同,所得的不等式也不同. 请根据以上材料,判断下列命题中正确命题的个数是( )
;
②
;
③
;
④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3fe2ef17248ee89e1ca43c0db267a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/807d5f1676dc00e9b0af4656ce047170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/807d5f1676dc00e9b0af4656ce047170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3fe2ef17248ee89e1ca43c0db267a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b3a5e0854a552973617a73ca89a6c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a4c61536e3e24b760066c88d5762a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff62be512f2e053659ed6e355adc3cc0.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e121b3db6729caa8fade2d606c5abd69.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c72f9fe9af333736b87aaeb5e331d5e5.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0895395eb64cb1d82cb01eedc75820.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 设函数
,
.
(1)当
时,求函数
的单调区间;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40db9dceb2d88988790ed9e6327d3a2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ae6d5e25c5bc3afe1ca6d86c219a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0dab614d13fbc46a0e79e7583f7eef1.png)
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名校
解题方法
4 . 设函数
.
(1)求函数
在
上的单调区间;
(2)求证:函数
在
上有且只有一个零点
,并求
(
表示不超过
的最大整数,如
).
参考数据:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802a2f8b34b7a7088735c573915921b7.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0167434c2c1a16e59e89d436ac0a1278.png)
(2)求证:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b5e51f08fcfaa95b58f3a14c8250a38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41667e2986ec718cabeeb1088794ed67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1697ae41e450c3893f65e9917e2744a9.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcb268db2f1559804fd1e3e548d22ce4.png)
您最近一年使用:0次
2024高三·全国·专题练习
解题方法
5 . 已知函数
.
(1)若函数
有三个零点分别为
,
,
,且
,
,求函数
的单调区间;
(2)若
,
,证明:函数
在区间
内一定有极值点;
(3)在(2)的条件下,若函数
的两个极值点之间的距离不小于
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077315c5a7b12294497294e536831d77.png)
(1)若函数
![](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/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1f5cd91996571c9da95e6f26bc80661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23292eca257af6a97309ee40ce6cbf9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37f19a2ad8f24cf63bff68be15faa67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799f6009a476fa056e1af71f26dd2fd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b094cba781181aeb90752170e9ba6c94.png)
(3)在(2)的条件下,若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c6ce02259a85ea191541f4a708738f1.png)
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6 . 如图,是一座“双塔钢结构自锚式悬索桥”,悬索的形状是平面几何中的悬链线,悬链线方程为
(
为参数,
),当
时,该方程就是双曲余弦函数
,类似的有双曲正弦函数
.
______.(用
,
表示)
(2)
,不等式
恒成立,求实数
的取值范围;
(3)设
,证明:
有唯一的正零点
,并比较
和
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98be08efebc64ff0fbc8d0ef819b0290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/594663e98b797cdc4efbd098cc15854f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2705e42f28cd5e415655cb1fbecf728b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd6153986cc8b26dd0e58cf92abc00e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/740eb38441fe1cc663275e9f84bacb26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515599523e72afd87bb9f2929425f35c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ff0b4309f7e59ab9c65410bdee9485.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c745eb108da3e42138a93d1ce780317f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a197403d3d4d35f97c483db6a95a1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a4ba376c9dfa67cc027d683476368f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a858b8c19d4627c256c8fd524051221a.png)
您最近一年使用:0次
7 . 已知函数
.
(1)证明:当
时,
;
(2)求
在区间
上的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a9612dbad9caecbf7168ea6600b967.png)
(1)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5cdde751120c6deab563a6f7f8cf05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e0dcb6d90f76291296aaa85710986cd.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55cfcbb5c5950e18a8452b38bb17036.png)
您最近一年使用:0次
名校
解题方法
8 . 已知函数
,函数
与
互为反函数.
(1)若函数
的值域为
,求实数
的取值范围;
(2)求证:函数
仅有1个零点
,且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff6838d84b68c6f0d3b93b196d9b08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7f56243e7c102bcea2755b9e5ab8455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求证:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6655e9e9bb9995d0c7e1dd02eb718d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1680e0b88a968543d32bb4ccf820e0d.png)
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2024-03-01更新
|
321次组卷
|
2卷引用:湖北省部分学校2023-2024学年高一上学期期末考试数学试题
2024·全国·模拟预测
9 . 已知函数
,且曲线
在点
处的切线方程为
.
(1)求实数
,
的值;
(2)证明:函数
有两个零点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/477439fd84ce8583818663c15c0435b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb59802d14676e0c842cab5cca28fb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13653a89d3a38346e1ddf4fd1602f85.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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10 . (1)证明:
;
(2)若
,
,利用(1)结合自己所学知识,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eb70e900ecb76be12d0606e0659d0ad.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b7e89829c7954488fa1f98bbc5bacb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09881de0dc186bbcd1e60eb00159ee97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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