名校
1 . 已知函数
,给出以下说法:
①当
有三个零点时,
的取值范围为
;
②
是偶函数;
③设
的极大值为
,极小值为
,若
,则
;
④若过点
可以作
图象的三条切线,则
的取值范围为
.
其中所有正确说法的序号为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e274d6bb0f7e618dcec88bb2791cdcf.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4208889a65489ead5fc22fae3ca26dd9.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/649ae1af4ab147dd31a773141cdd47d1.png)
③设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee99ca13d8b9948a264d82838b1c436d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
④若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c9708ef0dc6d6f5dcf6596d3e4f6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c47bcfe2d1bd9af0b9d80cb1ca9e0b.png)
其中所有正确说法的序号为
您最近一年使用:0次
名校
解题方法
2 . 已知函数
在
是减函数.
(1)求实数a的取值范围;
(2)记![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7bc56c99c9a6a751d92a8b398e82ee.png)
,当
时,
①求证:
在区间
内存在唯一极值点(记为
);
②求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad5854a3e006a1503b38666e56381d91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71163f419555f2ed76075c8ff659fbfc.png)
(1)求实数a的取值范围;
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7bc56c99c9a6a751d92a8b398e82ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5e07bf129b073f37b553fbca100172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fdbfcf9ffd7cdf7a74a8680afea926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c642de19a879df2e18cc5c5c44bd5b07.png)
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2022·全国·模拟预测
3 . 已知函数
,若
满足
,
,
,且对任意
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64d1f6f459292de1002f863203ce91a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc3d936c2f070789075f1c64a99c4ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b657825e125691bb6a804c7e3dc1b869.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a3e655c115ebddfb067d948f32e867e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c163db2c7788d48dc82c92e73d47c0b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/849d31f9a43cd82a6411b6da8aa766d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ef98cff324375eb11ec4b9342004c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebb98ff3a2c5b3482a408066011108af.png)
A.0 | B.6 | C.-6 | D.8 |
您最近一年使用:0次
4 . 已知函数
.
(1)求函数
的极大值点;
(2)若
为函数
的极大值点,证明:存在
使
且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3309b6e2a4ed81c120db4555d32a09c4.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abbd32114ea0f276580c7d900b96b4fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1860851b47ecd268ca79c518b2f173ee.png)
您最近一年使用:0次
名校
5 . 已知函数
(
),
(
),则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8799a2863f3c94175c23391cbaea519d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36183977fcdb1a87a5c7cef17133e6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
A.若![]() ![]() |
B.若![]() ![]() ![]() |
C.函数![]() ![]() |
D.过原点的动直线l与曲线![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2022-11-18更新
|
671次组卷
|
4卷引用:湖北省高中名校联盟2023届高三上学期第二次联合测评数学试题
名校
6 . 已知函数
,( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5c076a1ab9bc3f4fe8b5bd9151f606e.png)
A.若![]() ![]() ![]() |
B.将函数![]() ![]() ![]() ![]() |
C.函数![]() ![]() ![]() |
D.关于x的方程![]() ![]() ![]() |
您最近一年使用:0次
2022-11-10更新
|
621次组卷
|
2卷引用:浙江省杭州市2022-2023学年高三上学期期中数学试题
解题方法
7 . 已知曲线
在点
处的切线为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee1498b592f7d4602d6db5cfbfda4c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ab7295ee5ddbc64eea2d5b2f8661e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
A.当![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若存在过点P的直线![]() ![]() ![]() ![]() |
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8 . 已知函数
,且函数
有且只有两个零点,若
,则
的值域为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c655a74769a380e9302ef277702cfa6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0605de3c30e4ec821705fe4ae6c40653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe091eb5adf8cf34b485007e3d3d801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb708adff55a5bda517c3f570f06584c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2022-11-02更新
|
169次组卷
|
2卷引用:河南省豫南九校2020-2021学年高三上学期教学指导卷(二)数学(文)试题
9 . 下列说法正确的有( )
A.若![]() ![]() ![]() |
B.已知![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.函数![]() ![]() |
您最近一年使用:0次
解题方法
10 . 如图是某高山滑雪场的一段滑道的示意图,图中该段滑道对应的曲线可以近似看作某个三次函数图像的一部分,A,B两点分别是这段滑道的最高点和最低点(在这个三次函数的极值处).在A,B两点之间的滑道的最陡处,滑道的坡度为
(坡度即坡面与水平面所成角的正切值),经测量A,B两点在水平方向的距离为90m,则它们在竖直方向上的距离约为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
A.20m | B.30m | C.45m | D.60m |
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