名校
解题方法
1 . 在
中,
,那么
的值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb40b8581f9822977f82af38b979069d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6402f1010e94be78552ed4c45548b1b8.png)
您最近一年使用:0次
名校
解题方法
2 . 给出下列四个命题:
①命题“
,
”的否定“
,
”;
②a,b,c是空间中的三条直线,
的充要条件是
且
;
③命题“在
中,若
,则
”;
④若“
”是假命题,则p,q都是假命题;
其中的真命题是___________ .(写出所有真命题的编号)
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1984a78f4fa4bb93134765a89f3735ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8645952ea14b25443f411d39bdec641e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db40915f66115bb363bc9ca0c95a2bb5.png)
②a,b,c是空间中的三条直线,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fbc714c63815dad9a27418f6492f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2293799d379200cf746e8450ebd5744f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d4fc47a5814493cc5facdc3ab296dd.png)
③命题“在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
④若“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
其中的真命题是
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3 . 若
,
,如果对于
,
为假命题且
为真命题,则实数
的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e2e5d8b4b3d02d6c333132a044700e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2830b1baeb0ffd73e89525d5ca68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a723aebd8e4221c887b883733101e19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1803511584bb172d9445a4c49ab6fde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
4 . 已知
,下列四个结论正确的序号是______ .
①函数
在区间
上是减函数;
②点
是函数
图象的一个对称中心;
③函数
的图象可以由函数
的图象向左平移
个单位长度得到;
④若
,则
的值域为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25158de704d2259fec334fc22e51f90e.png)
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98fc67cc39a2b6857e45308d37ea4107.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/656d567ad105c13e222bc2d4c92f9be3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0915075cb1303fcbd677567d1c0b47bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb48434bdcafb5e084fc0b6396cb9469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70aa83a53d924ee21a5408a796a93774.png)
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2023-03-24更新
|
492次组卷
|
3卷引用:宁夏石嘴山市第三中学2022-2023学年高二下学期期末考试数学(理科)试题
名校
解题方法
5 . 已知直线
:
与直线
:
互相垂直,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e976891142f43f8b63cbadf4a040fe.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a38ed97053787ed2562e677a34465cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcde2f8a4958a41fd7e45c02ac543bda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e976891142f43f8b63cbadf4a040fe.png)
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解题方法
6 . 已知
,则
=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47604d554c495565babe714905ed5ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850dba25bf0f5f13541bf9b6ec12b84d.png)
您最近一年使用:0次
2022-07-07更新
|
751次组卷
|
3卷引用:宁夏平罗中学2022-2023学年高二下学期期末考试数学(理)试题
名校
7 . 已知椭圆
的左、右焦点分别为
,
是短轴的一个端点若
为钝角,则椭圆离心率的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94fe48bf7af022ecbbe13833fdcc2c8.png)
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2020-04-21更新
|
262次组卷
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2卷引用:宁夏石嘴山市平罗中学2019-2020学年高二下学期复学学业成绩检测数学(理)试题
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8 . 若在
中,
,则
是_____ 三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85bbd77abe60fe3490960f072e11647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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2019-01-04更新
|
695次组卷
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2卷引用:宁夏石嘴山三中2018-2019学年高二(上)第二次月考模拟试卷数学理科试题
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9 . 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b80751c98f9991b9cfc03923a98834.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dc2e750f1ec048fb76bca5c7be89a4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b80751c98f9991b9cfc03923a98834.png)
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2018-12-05更新
|
2105次组卷
|
4卷引用:宁夏石嘴山市第三中学2018-2019学年高二下学期期末考试数学(理)试题
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10 . 若
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add38be5a8d86bb081573d8b8b53acf8.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8d539e13b2c5b99458c94f3d4bffcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d19e4f9e19364460693cb66de89818.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add38be5a8d86bb081573d8b8b53acf8.png)
您最近一年使用:0次
2018-04-23更新
|
753次组卷
|
3卷引用:宁夏石嘴山市第三中学2016-2017学年高二上学期期中数学(文)试题