1 . 定义
为与x距离最近的整数(当x为两相邻整数算术平均数时,
取较大整数),令函数
,如:
,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb112e512d5a887410d86b7feace594.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b888f7b8ba7bb524207259273c5d31e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac9f6dd8dfc47f2c207cee942ce9256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c05d3d419bb90b252a6850b5861b839.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8997b3f345bfc05556015adffd72c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f868986895a1318bb65db1a2507648ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a75c6e2b2f2a1d77dd4048a6b80ee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0672202d742a897b1bc0920284e17c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb112e512d5a887410d86b7feace594.png)
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2023-10-23更新
|
325次组卷
|
2卷引用:浙江省金华第一中学2023-2024学年高一上学期10月月考数学试题
名校
解题方法
2 . 长方体
中,
,
,则异面直线
和
所成角的余弦值是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2eb89294b31ffdd2680b4361e8994d7.png)
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2023-10-23更新
|
200次组卷
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4卷引用:浙江省台州市临海市灵江中学2023-2024学年高二上学期10月月考数学试题
3 . 已知空间向量
,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df3475d6a1cb27cf459b96c2875aad60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b82bb87b5161d9804e59661cf80c2c91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dced91de1b8c38aa95ffee0e5dc202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
您最近一年使用:0次
名校
4 . 如图,三棱锥
中,
平面ABC,
,且
,
.若D是棱PC上的点,满足
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a93b9e58955cd81f6d2444a284c58be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba6e91d40d12e8e6b2ab55bc541adeca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfa54114f04a75b8c96165b3718ed7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://img.xkw.com/dksih/QBM/2023/10/20/3350169606774784/3352061134553088/STEM/d36093c4747f4beba11862f9bef64ff9.png?resizew=149)
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2023-10-23更新
|
350次组卷
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4卷引用:浙江省台州市临海市灵江中学2023-2024学年高二上学期10月月考数学试题
浙江省台州市临海市灵江中学2023-2024学年高二上学期10月月考数学试题(已下线)第一章 点线面位置关系 专题二 空间垂直关系的判定与证明 微点2 空间直线垂直的判定与证明综合训练【基础版】(已下线)考点10 空间向量的应用 2024届高考数学考点总动员【讲】海南省海口市农垦中学2023-2024学年高二上学期期中数学试题
解题方法
5 . 如图,正方形
和正方形
的边长都是1,且它们所在的平面所成的二面角
的大小是
,
,
分别是
,
上的动点,且
,则
的最小值是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03edbab2be470153ed4ebe16c25430b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29819c98ebd087116d5e579f4f088fe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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名校
解题方法
6 . 已知不等式
在
上有解,则实数
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dda55947cff18d2d8b18497ffa97b1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b97ab84192e12bb292bc9fbd0b29fbee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2023-10-22更新
|
1272次组卷
|
4卷引用:浙江省台州市路桥中学2023-2024学年高一上学期10月月考数学试题
浙江省台州市路桥中学2023-2024学年高一上学期10月月考数学试题宁夏回族自治区银川市第二中学2023-2024学年高一上学期期中考试数学试题辽宁省铁岭市某校2023-2024学年高一上学期期中考试数学试题(已下线)第6题 函数性质图象联手,函数不等式对策多(优质好题一题多解)
名校
7 . 现有两种理财产品,已知投资这两种理财产品所获得的年利润分别是
和
万元,它们与投入资金
(万元)的关系如下:
,某人有5万元准备投入这两种理财,则他可以获得的最大利润是__________ 万元.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d630b1d88b58a23ad56d97e9730fd34c.png)
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解题方法
8 . 如图,已知三棱锥
中,
,
和
都是边长为2的正三角形,点E,F分别是AB,CD的中点.那么异面直线AF和CE所成角的余弦值等于______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13d28cb7181257cf732af4b615fc47d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/16/d01b47ee-8ec4-486b-8ead-c7d3e197d0d2.png?resizew=149)
您最近一年使用:0次
解题方法
9 . 已知集合
,若
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/712b4cd5709455d4af8dbdfcbeb220d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35829a7703bfa35d1c8614beb2670c4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81640883dddb228c7ccbc9a9ee5c21d7.png)
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10 . 若
满足
,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ff2912fd8d93b6e692936d95b727c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3056860bc617fd11cbb5d223204ba062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e4828b21e599eb431148eb6e6b0641.png)
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2023-10-22更新
|
233次组卷
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3卷引用:浙江省金华市曙光学校2023-2024学年高一上学期第一次阶段考试数学试题