1 . 已知函数
.
(1)求
的最小正周期和对称轴;
(2)求
在区间
上的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3f3ad139344663b3d5e0af23ffbcb6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d51992c05a557cf6058664f1f8961e.png)
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2 . 已知梯形ABCD中,
,
,
,
,
,点P,Q在线段BC上移动,且
,则
的值可能为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee63d7a67287c5254793609eef77f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e3f3f09715fd737324ea48c3696485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d701bfb771b01d88593d41cecf0832.png)
A.3 | B.![]() | C.![]() | D.![]() |
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3 . 已知点P是
所在平面内的动点,且满足
,射线
与边
交于点D,若
,
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3da058e641c1998601274bf60707400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9680bd6f250acb8b568510419b59d3e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfeaa1a43e68842e1a617967ab6ce535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2043525d692d0a9568d848748f1ea09a.png)
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4 . 下列是有关
的几个命题,其中正确命题有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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5 . 已知向量
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ef55542504e8d147448cbfb6eaad7a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6234d132ead5cf8194883f1b3fe22622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc2cfcad001f134dfaab9460b29a3c08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ef55542504e8d147448cbfb6eaad7a.png)
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6 . 已知
.
(1)若
,求
的值;
(2)若
,
且
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52769fa3c6425cd25eebaeb1409e8c9e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee57c3926fb6270949209069db695e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07560f8981f8a6fb2c7ce36f0df1b5af.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/219b5309b908b903b61887b32f9b34ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66fc5197294a13cc768cd0b1f91998bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dcbe8b4bcd32e5a64ebfd873f8cbb2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4a3a19bca966bcb61027004548512e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db796b223b35e52aa7b4114da8072f5.png)
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2024-03-31更新
|
254次组卷
|
2卷引用:四川省凉山州民族中学2023-2024学年高一下学期3月月考数学试题
名校
解题方法
7 . 设O为坐标原点,定义非零向量
的“相伴函数”为
,
称为函数
的“相伴向量”.
(1)设函数
,求函数
的相伴向量
;
(2)记
的“相伴函数”为
,若方程
在区间
上有且仅有四个不同的实数解,求实数k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b84dac41f87e939f6cc39f38dc59b78d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b0e4e35cf9b9f97c19e4b72cc2a1b09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b84dac41f87e939f6cc39f38dc59b78d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc54bc56c16baa3643686b85a6130e4.png)
(1)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15530d256df9ecf36c7476381c7ab3b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e723e57753f0a4fe1ef8ca1aee0e2117.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3fa5a2ec0f43acc49c5f7f848f212c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/227e04b76330c7bc1f7b62a1756cd5a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b604c6522119e77c1cb16b91532a2c1.png)
您最近一年使用:0次
2024-03-31更新
|
342次组卷
|
2卷引用:四川省凉山州民族中学2023-2024学年高一下学期3月月考数学试题
解题方法
8 . 关于函数
,下列说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d53e84446ab2d482dd8cdfeb27b402.png)
A.函数![]() |
B.![]() |
C.函数![]() ![]() |
D.函数![]() |
您最近一年使用:0次
2024-01-27更新
|
194次组卷
|
2卷引用:四川省凉山州西昌市2023-2024学年高一上学期期末检测数学试题
解题方法
9 . 2023年7月到8月,世界大学生运动会在四川成都举行,四川某文创公司制作了一款大熊猫主题纪念品即将投放市场,根据市场调研情况,预计每个纪念品的市场价y(单位:元)与上市时间x(单位:天)的数据如下表.
(1)根据上表数据从下列函数中选取一个恰当的函数,描述该大熊猫主题纪念品的市场价y与上市时间x的变化关系,并说明理由;
①
(
且
);
②
(
);
③
(
且
).
(2)利用你选取的函数,求该大熊猫主题纪念品的市场价最低时的上市天数及最低的价格.
上市时间x(单位:天) | 1 | 5 | 9 |
市场价y(单位:元) | 35 | 11 | 19 |
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a83c4d90a103fe9fcb50f64cd83266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b6db5e73d9867e2ada871f66878da9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
(2)利用你选取的函数,求该大熊猫主题纪念品的市场价最低时的上市天数及最低的价格.
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解题方法
10 . 已知函数
.
(1)用函数单调性的定义去证明:
在区间
单调递增;
(2)关于x方程![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1b1262758526afb922d702f0713764.png)
恰有两个不同实数根,求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceb85e8e0c2998717346b6e97543c38e.png)
(1)用函数单调性的定义去证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
(2)关于x方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1b1262758526afb922d702f0713764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64d9db508c0efd5a9635c37523179b25.png)
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