名校
1 . 已知函数
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda318adf65c6b6fd45f651365f52346.png)
(1)求
的最大值
(2)写出
与
的大小关系,并给出证明
(3)试问
能否作为
三边长?若能,给出证明,并探究
的外接圆的半径是否为定值?若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1044dcf4fba551e1b7fbfeb895ea08c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda318adf65c6b6fd45f651365f52346.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b692262286e03cc0536598789fab8699.png)
(2)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88fd5c1ef0fc722337a4984834829c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e7bb46b41cd3f1f9b5621c20bf7fe07.png)
(3)试问
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b799aaa36edd0d10fc38925ce2e55045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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|
114次组卷
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2卷引用:福建省泉州市安溪第八中学2023-2024学年高一下学期6月份质量检测数学试题
2 . 高中教材必修第二册选学内容中指出:设复数
对应复平面内的点
,设
,
,则任何一个复数
都可以表示成:
的形式,这种形式叫做复数三角形式,其中
是复数
的模,
称为复数
的辐角,若
,则
称为复数
的辐角主值,记为
.复数有以下三角形式的运算法则:若
,则:
,特别地,如果
,那么
,这个结论叫做棣莫弗定理.请运用上述知识和结论解答下面的问题:
(1)求复数
,
的模
和辐角主值
(用
表示);
(2)设
,
,若存在
满足
,那么这样的
有多少个?
(3)求和:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b40b6895776e0807c2baecbc8f33a8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1116c1a2be36c2952f3f621854433824.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983fa8f4d178a0a909226523a33d521c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b40b6895776e0807c2baecbc8f33a8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/437f03842c607c5554d86177ce090def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eec3e684af41f9ed4db5b931b9ccfb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f56cfb41ee7cb758fee138ab09e0d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30cac4804764e9ffa2a2c9c37e450713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6481f56ecdb2488e91835028d3cc7e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b604ddba45cd6dbf1b937f9db82906d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77476f0974841f574785fc9940b2f8ca.png)
(1)求复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/042b282f488b75517fb269e8b2512125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1d604600d084879cf3199cd0282345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce48af55c99256efdc68fac0767d944c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f56cfb41ee7cb758fee138ab09e0d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f3b1a317184018ea9efc8154a878658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a40142c84be68ee2918c3a8303388c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/388d3d213a231cccf854a29eef611d01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dffae22ae38d7238130e81a9e554d94b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(3)求和:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f152097ab61600de85e8181d056dab9b.png)
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2卷引用:福建省安溪铭选中学2023-2024学年高一下学期6月份质量检测数学试题
名校
解题方法
3 . 如图(1),正三棱柱
,将其上底面ABC绕
的中心逆时针旋转
,
,分别连接
得到如图(2)的八面体
,依次连接该八面体侧棱
的中点分别为M,N,P,Q,R,S,
(ⅰ)求证:
共面;
(ⅱ)求多边形
的面积;
(2)求该八面体体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3a008a5ce2f3e0d93bf1b31f1e941d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b73c7e51c2fbe79faa78e5287d2ccc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff5cc57686ee7429fee0907651083c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a40d2cf43fce0c99dff3470d554eb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff5cc57686ee7429fee0907651083c4.png)
(ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8ae231960760617a585b8478185d8ac.png)
(ⅱ)求多边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3662c929bd88085eb96dd4797482de.png)
(2)求该八面体体积的最大值.
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名校
解题方法
4 . 在通用技术课上,老师给同学们提供了一个如图所示的木质四棱锥模型
,
为正三角形,
,
,
为线段
的中点.
平面
;
(2)过点
的平面
交
于点
,沿平面
将木质四棱锥模型切割成两部分,在实施过程中为了方便切割,请你完成以下两件事情:
①在木料表面应该怎样画线?(在答题卡的图上画线要保留辅助线,并写出作图步骤);
②在木质四棱锥模型中确定
点的位置,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ad8d16722f5b9e7fd2602f14d5ffbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b0382c28547d3834ca71f3f0677695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0457394ce4f2dc8d940c565c94dcf557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d94061dfdcef084c7594522ae9e512a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
①在木料表面应该怎样画线?(在答题卡的图上画线要保留辅助线,并写出作图步骤);
②在木质四棱锥模型中确定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8136c029f4b31e25c56c70a1432cbe1a.png)
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5 . 在长方体
中,
,
,
,以
为原点,
、
、
所在直线分别为
轴、
轴、
轴的正方向,建立空间直角坐标系,则点
可用有序数组
表示.空间中任意一点可用有序数组
表示,定义空间中两点
,
的距离
.
为边
(含端点)上的动点,证明:
为定值;
(2)
,
,
为空间中任意三点,证明:
;
(3)若
,
,其中
、
、
,求满足
的点
的个数
,并证明从这
个点中任取11个点,其中必存在4个点,它们共面或者以它们为顶点的三棱锥体积不大于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de5d5dc7fd9e2a9ebac16a4147979d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca9ce42d7ae1d4b67045e78c3ab05f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf9e23910557d245d6e7d5959d91e135.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a334cd1d83ebe328877006f689e28bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef8337706c550bc095d7a2bd872221a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c66066f64a28eb515f8de3a4e063292e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b5ff1d52b11822af84e82488a9e546e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d594e1827f2d6d03295009b1ed75b3d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0f92b567c6128f0ada19a3b7a243abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2beb0dd80eb2f71473e399c1332ce71f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2f0eabf0b9199ff58f94b72507b051a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50c35157956d1d4679598ee26bd408d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f63a978622110d66c5fdb4c9ed08539b.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c289e83620c6a6f873d116eed1e053f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba96eac12eb5f43f43b74d7f513f725e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9314bd1d7a6e070f4f2428f9a321804e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50ecc49abb6be7701f68cfc09598c324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c7f3377167e892a662c15787b372f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a391005600bdd69c96750589f9adb048.png)
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名校
解题方法
6 . 在
中,角
,
,
的对边分别为
,
,
,点
,
,
分别位于
,
,
所在直线上,满足
,
,
(
,
,
).
是边长为3的正三角形,且
,求
;
(2)如图2,若
,
,
交于一点
,
①求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454845e47d30210e1052f288c04a3828.png)
②若
,
,
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05edc2270435e31e1c6246f2e73d319c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c730e8a8b00a42f640f47bdbe0ced2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8b8c1e566d5c3d13d732e99b5214da8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1a609b7b505947a8a2f34fbed4b2208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6d7ff5d48857835f5127cb41cd607bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc8047ecbb77a3c5f61ab430b2279f3.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454845e47d30210e1052f288c04a3828.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ea1abafdbaa3ed5568822c52ee19af5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ef5a4055fb0bac59cc504a71735417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52dde258c86bc5af02e2eee95448d0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fab7aa572678c1776345bcb4d622393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cbff84327e964f912a54032e76ccc9.png)
您最近一年使用:0次
2024-04-23更新
|
738次组卷
|
4卷引用:福建省厦门第一中学2023-2024学年高一下学期第一次适应性训练(月考)数学试题
福建省厦门第一中学2023-2024学年高一下学期第一次适应性训练(月考)数学试题福建省厦门第一中学2023-2024学年高一下学期第一次适应性数学试题(已下线)模块五 专题五 全真拔高模拟(高一)(已下线)模块五 专题5 全真拔高模拟1(北师版高一期中)
名校
解题方法
7 . 在某抽奖活动中,初始时的袋子中有3个除颜色外其余都相同的小球,颜色为2白1红.每次随机抽取一个小球后放回.抽奖规则如下:设定抽中红球为中奖,抽中白球为未中奖;若抽到白球,放回后把袋中的一个白色小球替换为红色;若抽到红球,放回后把三个球的颜色重新变为2白1红的初始状态.记第n次抽奖中奖的概率为
.
(1)求
,
;
(2)若存在实数a,b,c,对任意的不小于4的正整数n,都有
,试确定a,b,c的值,并证明上述递推公式;
(3)若累计中奖4次及以上可以获得一枚优胜者勋章,则从初始状态下连抽9次获得至少一枚勋章的概率为多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
(2)若存在实数a,b,c,对任意的不小于4的正整数n,都有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f7a0cdf4919f3a61788a57487780bfe.png)
(3)若累计中奖4次及以上可以获得一枚优胜者勋章,则从初始状态下连抽9次获得至少一枚勋章的概率为多少?
您最近一年使用:0次
2024-04-19更新
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829次组卷
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3卷引用:福建省安溪铭选中学2023-2024学年高一下学期6月份质量检测数学试题
名校
8 . 在
中,内角
的对边分别为
,且
.
(1)求
.
(2)若
,点
是边
上的两个动点,当
时,求
面积的取值范围.
(3)若点
是直线
上的两个动点,记
.若
恒成立,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38e316ce37a4e6964f2872471ba6035d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1113ce8ff2b2113a466e8cdaf05dff89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2264aa0d66a9542095586afb611c048d.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff9709ce2ca2e90912412c50332f6778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe8975e2f0098642933c12ac5a8ba932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
2024-04-16更新
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1233次组卷
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7卷引用:福建省泉州市泉州一中、泉港一中、厦外石狮分校三校联盟2023-2024学年高一下学期5月期中联考数学试题
名校
解题方法
9 . 如图所示,某市政府计划在该扇形地域内建设图书馆,为了充分利用这块土地,并考虑与周边环境协调,要求该图书馆底面矩形
的四个顶点都落在边界上.经过测量,扇形的半径为
,
,
.记弧
的中点为G,连接
,分别与
,
交于点M,N,连接
,设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/57c550c6-2941-4faa-beaf-33c1c82254e2.png?resizew=165)
(1)求矩形
的面积关于
的函数
;
(2)求矩形
的最大面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8badcdb1e5621f0ac4d9272041185a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff5c21185c13eae675906dabd3593c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cbad6599796efc1c177ae9349feda9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554d5d0e557fe3c4162046d40c90324b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/57c550c6-2941-4faa-beaf-33c1c82254e2.png?resizew=165)
(1)求矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd7229922fbb3ce09dada883f74fbb1.png)
(2)求矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
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10 . 一般地,
元有序实数对
称为
维向量.对于两个
维向量
,定义:两点间距离
,利用
维向量的运算可以解决许多统计学问题.其中,依据“距离”分类是一种常用的分类方法:计算向量与每个标准点的距离
,与哪个标准点的距离
最近就归为哪类.某公司对应聘员工的不同方面能力进行测试,得到业务能力分值
、管理能力分值
、计算机能力分值
、沟通能力分值
(分值
代表要求度,1分最低,5分最高)并形成测试报告.不同岗位的具体要求见下表:
对应聘者的能力报告进行四维距离计算,可得到其最适合的岗位.设四种能力分值分别对应四维向量
的四个坐标.
(1)将这四个岗位合计分值从小到大排列得到一组数据,直接写出这组数据的第三四分位数;
(2)小刚与小明到该公司应聘,已知:只有四个岗位的拟合距离的平方
均小于20的应聘者才能被招录.
(i)小刚测试报告上的四种能力分值为
,将这组数据看成四维向量中的一个点,将四种职业
的分值要求看成样本点,分析小刚最适合哪个岗位;
(ii)小明已经被该公司招录,其测试报告经公司计算得到四种职业
的推荐率
分别为
,试求小明的各项能力分值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/086eb439f6a1578fdba904825340772d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/728f740c8ad3983bf2e51b1a7dc42c36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a556a8011e12f1dcd7cd458a4b35ece9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e260b088f071983f254ce8f5163fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e260b088f071983f254ce8f5163fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b216d768026fa703c4a84ae2a8df0449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a872e033a5bee216ecf0b656fe122742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83a60c26f1979ea77bdb59cd85342bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa556d0a8348ebac5888d9381a74cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b1dbff69a597a3f9aa8783a4c174153.png)
岗位 | 业务能力分值 | 管理能力分值 | 计算机能力分值 | 沟通能力分值 | 合计分值 |
会计(1) | 2 | 1 | 5 | 4 | 12 |
业务员(2) | 5 | 2 | 3 | 5 | 15 |
后勤(3) | 2 | 3 | 5 | 3 | 13 |
管理员(4) | 4 | 5 | 4 | 4 | 17 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629da762b7571611670f5b6f22cf2f7c.png)
(1)将这四个岗位合计分值从小到大排列得到一组数据,直接写出这组数据的第三四分位数;
(2)小刚与小明到该公司应聘,已知:只有四个岗位的拟合距离的平方
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab58b13ac4379f8aef381f54eeaacca.png)
(i)小刚测试报告上的四种能力分值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5915cbb31d1cd4dc188b97e4354cf04f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17e60233c2784b997e48546af6dbac3e.png)
(ii)小明已经被该公司招录,其测试报告经公司计算得到四种职业
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17e60233c2784b997e48546af6dbac3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c809f18069c13e373486308339e4f9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51cc86cca36bac13e309cfea252fc00.png)
您最近一年使用:0次
2024-02-23更新
|
1191次组卷
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4卷引用:福建省泉州市第七中学2023-2024学年高一下学期期中考试数学试题
福建省泉州市第七中学2023-2024学年高一下学期期中考试数学试题单元测试B卷——第九章?统计浙江省L16联盟2023-2024学年高三下学期返校适应性测试数学试题(已下线)第1套 重组模拟卷(模块二 2月开学)