1 . 德国数学家狄利克雷在数学领域成就显著,以其命名函数
,该函数被称为狄利克雷函数,关于狄利克雷函数有如下四个命题:
①
;②对任意
,恒有
成立;
③任取一个不为零的有理数
,
对任意实数
均成立;
④存在三个点
、
、
,使得
为等边三角形;
其中真命题的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45f43182131a34b3e094678aac2e419.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a336131c014bbc0e8335a0563cb9a3d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9322dd8f56b5f8d2c667fdf0d4a9f9aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433f6b9b7fac3b81c8ed21130acd2b27.png)
③任取一个不为零的有理数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d4733dc784c0deec396b4d7ec32316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
④存在三个点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741779d13c0e882dfdd90561450883ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82170a0e0e186bfe372be1ffc74af69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae3b7ee8239d9dacff0227ed38e8d61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
其中真命题的序号为( )
A.①②③④ | B.②④ | C.②③④ | D.①②③ |
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2024-01-23更新
|
247次组卷
|
2卷引用:新疆乌鲁木齐市第十九中学2023-2024学年高一上学期期末诊断性测试数学试卷
解题方法
2 . 已知
,
是双曲线
的两个焦点,P为C上一点,且
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4058fc45c49e6710ba7e273cb7888704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8da315d06311a9e65c6d862d2a72a7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
A.![]() | B.2 | C.1 | D.![]() |
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解题方法
3 . 如图,直三棱柱
中,
,
,
、
分别是棱
、
的中点.点
到平面
的距离是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cad7b03f934718b18ce34cdf0b85863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5875cc0a340a06247ae56aff8f6d377.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/22/3261f078-7ae3-413b-9e5f-c46e52131ff1.png?resizew=183)
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解题方法
4 . 已知幂函数
在
上单调递增.
(1)求m的值,并确定
的解析式;
(2)
,求
的定义域和值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700cf041d31cff475734be1fe347142a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
(1)求m的值,并确定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed6b703aa6c677bfd18e6e21f89f9bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
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5 . 投资理财是指投资者通过合理安排资金,运用合法的投资理财工具对资产进行管理和分配,达到保值增值的目的,从而加速资产的增长.小薛有一笔资金用于投资,现有三种投资方案供选择,这三种方案的回报如下:
方案一:每天回报20元.
方案二:第一天回报5元,以后每天比前一天多回报5元.
方案三:第一天回报0.8元,以后每天的回报比前一天翻一番.
设第
天所得回报是
元.
(1)若小薛采用方案三进行投资,试写出
关于
的函数关系式.
(2)若小薛计划用该笔资金投资8天,试问哪种方案所得的总回报最多?最多为多少元?
方案一:每天回报20元.
方案二:第一天回报5元,以后每天比前一天多回报5元.
方案三:第一天回报0.8元,以后每天的回报比前一天翻一番.
设第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0acd5554878dee1454ebddb5d2d2db3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)若小薛采用方案三进行投资,试写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若小薛计划用该笔资金投资8天,试问哪种方案所得的总回报最多?最多为多少元?
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2024-01-18更新
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109次组卷
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2卷引用:新疆阿勒泰地区2023-2024学年高一上学期期末联考数学试题
6 . 有一组样本数据
,其中
是最小值,
是最大值,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2c7833580b76544d876b4780e3d130.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20c1e5866f81c045a596079ac4a7671.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
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2024-01-17更新
|
257次组卷
|
2卷引用:新疆维吾尔自治区喀什地区喀什十四校2023-2024学年高二上学期期末数学试题
名校
7 . 若定义在
上的奇函数
在
单调递减,且
,则满足
的
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad2edd8edcb21bd41584daf9bb95a5c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec65a2bec3d4296c613a80b3ae41d5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc6e4ec8e68bec35c3a8593e5f87918c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
8 . 已知
是定义在
上的偶函数,且在
上单调递增,则下列结论错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad2edd8edcb21bd41584daf9bb95a5c7.png)
A.![]() ![]() | B.![]() |
C.![]() | D.若实数![]() ![]() ![]() |
您最近一年使用:0次
名校
解题方法
9 . 设函数
的定义域为
,若对于
内任意两个值
,
,都有
,则称
具有
性质.给定四个函数①
②
③
④
,则上述函数中具有
性质的函数序号是___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/c1bedaf3854b48806b82b3b804451cf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/591c5b712dc14517e369be2345526fc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b734eb2bc8266344b97f7f970c2481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b1c079afd1b058adc67a50f48f3d466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff6838d84b68c6f0d3b93b196d9b08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc873fc03e6e4d3c4ba02f8b1147b20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/591c5b712dc14517e369be2345526fc7.png)
您最近一年使用:0次
名校
解题方法
10 . 已知
,且
.
(1)求
,
;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f331c3d96c5812a620e326373747eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f55b8836b41be612a52ca9caf97006.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4afb76bededcba098e511e65d95b1e4.png)
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