名校
解题方法
1 . 函数
,关于函数
的零点情况有下列说法:
①当
取某些值时,无零点; ②当
取某些值时,恰有1个零点;
③当
取某些值时,恰有2个不同的零点; ④当
取某些值时,恰有3个不同的零点.
则正确说法的全部序号为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f24bd5843cbfaff1885592a83275ad7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2853174cf50c71d58b7d57d7048088.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
则正确说法的全部序号为
您最近一年使用:0次
2024-03-27更新
|
163次组卷
|
2卷引用:上海民办南模中学2023-2024学年高一下学期期中考试数学试卷
解题方法
2 . 如果
是离散型随机变量,则
在
事件下的期望满足
其中
是
所有可能取值的集合.已知某独立重复试验的成功概率为
,进行
次试验,求第
次试验恰好是第二次成功的条件下,第一次成功的试验次数
的数学期望是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa0010cb466163db1349fc1040f6b439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90a71f2ff30791e8b210727912600096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ad71223cc853bc21bf203e7a5321f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385f040f4037e9934620d6971da08131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.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/f022950e0faa45b617d497b01b5292b9.png)
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名校
解题方法
3 . 已知甲同学从学校的2个科技类社团、4个艺术类社团、3个体育类社团中选择报名参加,若甲报名了两个社团,则在有一个是艺术类社团的条件下,另一个是体育类社团的概率为_____ .
您最近一年使用:0次
2024-03-19更新
|
2128次组卷
|
6卷引用:上海市松江一中2024届高三下学期阶段测试1数学试题
名校
4 . “守得住经典,当得了网红”,这是时下人们对国货最高的评价,网络平台的发展让越来越多的消费者熟悉了国货品牌的优势,使得各大国货品牌都受到高度关注,销售额迅速增长,已知某国货品牌2023年8-12月在
网络平台的月销售额
(单位:百万元)与月份
具有线性相关关系,并根据这5个月的月销售额,求得回归方程为
,则该国货品牌2023年8-12月在
网络平台的总销售额为______ 百万元.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab03167654ae6577c08143962fcd2127.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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2024-02-14更新
|
197次组卷
|
4卷引用:上海市复旦大学附属中学2023-2024学年高二下学期期中考试数学试卷A
上海市复旦大学附属中学2023-2024学年高二下学期期中考试数学试卷A(已下线)专题08成对数据的统计分析--高二期末考点大串讲(沪教版2020选修)江西省上进联盟2023-2024学年高二上学期1月期末联考数学试题(已下线)专题04 成对数据的统计分析-1
名校
5 . 在空间直角坐标系中,点P坐标可记为
:定义柱面坐标系,在柱面坐标系中,点P坐标可记为
.如图所示,空间直角坐标
与柱面坐标
之间的变换公式为:
,
,
.则在柱面坐标系中,点
与点
两点距离的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d594e1827f2d6d03295009b1ed75b3d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9913222c15a1a347b1a02f76ed54a782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d594e1827f2d6d03295009b1ed75b3d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9913222c15a1a347b1a02f76ed54a782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2640f8df813aa4916984fb30e90a9a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41995465f408e58668525745373aa7c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2abb31a34f7c99d6891453dd1d6e6ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c34ace65d315585e942d7194fc08582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d57e7a83bdad98eb39cadf3362abc0a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/6/93eda1ce-cbf2-4ae0-96ce-06455567531a.png?resizew=138)
您最近一年使用:0次
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6 . 设直线
与平面
所成角为
,给出下列命题:(1)平面
上有且仅有一条直线与直线
所成角为
;(2)平面
上不存在直线,使之与
所成角小于
;(3)设
,平面上恰有两条直线与
所成角均为
;(4)若直线
,则直线
与
所成角大小为
;其中真命题的序号为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb2c8b58918fbd95e790c01e73a3f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94bfcfac3329600f20e269487abd5f1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b59b1a01a6da42ff2a41e5b91ea301ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86cab34861ef1ca97c9690ee9d8aef1c.png)
您最近一年使用:0次
名校
解题方法
7 . 已知方程
的曲线是一个菱形,以此菱形的四个顶点为顶点的椭圆方程是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f039dae01115fd639c5a139b9428ced.png)
您最近一年使用:0次
8 .
表示以点
为中心的椭圆,如图所示,
为椭圆C:
的左焦点,Q为直线
上的一点,P为椭圆C上的一点,以
为边作正方形
(F,P,A,B按逆时针排列),当P在椭圆上运动时,
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc5d275721db46e39e5b23a7f2b64268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9799b1b1f49ef15916b0018547564590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa04eb7cae40ce5e89da590b9cdb75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134dde7006742eba3252cb11fe959abe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98f739b07f992bce672aef2fc48b4b93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857e804aac2f81757178d237485299fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b65ea04098e8d2809d8163f27d49860c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/cf3db5f3-5935-4e04-8948-1081f9a525e9.png?resizew=187)
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解题方法
9 . 如图,在一个轴截面为正三角形的圆锥形容器中注入高为h的水,然后,将一个铁球放入这个圆锥形的容器中,若水面恰好和球面相切,则这个球的半径为_______ .
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/26/7ea093cd-b020-43eb-9ed1-eb5453f1aed4.png?resizew=255)
您最近一年使用:0次
10 . 如图,在直角三角形
中,
,
垂直于斜边
,且垂足为
,设
及
的长度分别为
和
,
是
的中点,点
绕点
顺时针旋转
后得到点
,过
点作
垂直于
,且垂足为
.有以下三个命题:
①由图知
,即可以得到不等式
;
②由图知
,即可以得到不等式
;
③由图知
,即可以得到不等式
;
以上三个命题中真命题的是______ .(写出所有正确命题的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8e9ec412ea0355e4e5cd06c60e5fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87f673c8f5c214d1e59bfe21fe82397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ff7caec4fdd8fb54a3ffbff9692414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
①由图知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31367f0685c866fb013012c699803a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/160414ad552f0f114a6bc92bcf000270.png)
②由图知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7ffac6c07b3208f1ab97386df03b617.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b22fa0018340c11558c0ef8dbe422cb0.png)
③由图知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddff7f3e7ba78336d8b9d96d0065e1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/516372020f70ab0b86e02f96f3e684e1.png)
以上三个命题中真命题的是
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/26/e5b38708-1c30-46c5-b816-773546683593.png?resizew=188)
您最近一年使用:0次