解题方法
1 . 在
中,角
的对边分别为
,点
在
的延长线上,且
.
(1)若
,求
的面积;
(2)
,求
.
![](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/9a6290b842f54550280585910e10fdc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/510634e49198fc429d942d00fa5446ab.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0230fe9e61bb9fece11b5266efa8d85f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80902ad325c8e0a45fdb55301c002b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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2 . 设
,
,则
是
的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd58c2853cc753fe513869de70a81220.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57fbacd61a1aacb6319be16cd27c1710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
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3 . 若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab0967af188fba7d0d7cae00378785f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d40b5aa6908225a0f9992b81c5a312.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-07-22更新
|
86次组卷
|
2卷引用:西藏拉萨市2022-2023学年高二下学期期末联考数学(理)试题
4 . 复数
的虚部是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3042528734b1991c4b0a786fd4e34483.png)
A.![]() | B.1 | C.![]() | D.2 |
您最近一年使用:0次
2023-07-22更新
|
60次组卷
|
2卷引用:西藏拉萨市2022-2023学年高二下学期期末联考数学(理)试题
解题方法
5 . 如图,四棱锥
的底面是矩形,侧面
是正三角形,且侧面
底面
,
为侧棱
的中点.
(1)求证:
平面
;
(2)若
,试求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/22/ed1fd3f4-3ac1-49af-9bf7-8ae81ec02465.png?resizew=173)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acf2bc3dd1f1ae5d5e28b0366f454ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ddd49625097d0a78df7170be4f882e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65bf87f74420270138ed73a2d38ca48.png)
您最近一年使用:0次
解题方法
6 . 已知在
的展开式中,第3项的二项式系数与第4项的二项式系数相等,且
的系数为80,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31231d05b550bbad5be8762ca1921d9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d800f03de80068a1172beac3a2c75587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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7 . 在等差数列
中,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa3f8ff3757dd382060a9d141cd9ded6.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c5d97312b0c5392caf086deab599042.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa3f8ff3757dd382060a9d141cd9ded6.png)
您最近一年使用:0次
8 . 已知命题:①设随机变量
,若
,则
;②命题 “
,
”的否定是“
,
”;③在
中,
的充要条件是
;④若对于任意的
,
恒成立,则实数
的取值范围是
;以上命题中正确的是____________ (填写所有正确命题的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e97e5987d6c48952eea42eabcbcf9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d5788fc3e5f39261ad76a8296543e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84cd234f6e6846b8f888a22c843fc2a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8645952ea14b25443f411d39bdec641e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/264dab145ceba44696a6ee63b1e1549d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/264dab145ceba44696a6ee63b1e1549d.png)
![](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/62b2f44bda467c786287c7356d4ed9f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13f6f33b171a6bddb3a253076d61df86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1b4cc621ff98854b24ee610c05de91.png)
您最近一年使用:0次
9 . 已知函数
的图象在点
处的切线与
平行,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e83033e40b329dd24b0ae6ef399f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04eed461026f69fe9ab2c5dc12af8ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
A.-1 | B.1 | C.-2 | D.2 |
您最近一年使用:0次
解题方法
10 . 已知抛物线
:
的焦点
与
的一个焦点重合,过焦点
的直线与
交于
,
两不同点,抛物线
在
,
两点处的切线相交于点
,且
的横坐标为4,则弦长
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049cdb7561122405c1c302079593c987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adcea43246b86730e37244c3f1425fc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bee8e70f1fab639be1636c7bce0477.png)
A.12 | B.14 | C.15 | D.16 |
您最近一年使用:0次
2023-07-21更新
|
422次组卷
|
5卷引用:西藏日喀则市2022-2023学年高二下学期期末统一质量检测数学(理)试题
西藏日喀则市2022-2023学年高二下学期期末统一质量检测数学(理)试题(已下线)专题3.10 圆锥曲线的方程全章八类必考压轴题-2023-2024学年高二数学举一反三系列(人教A版2019选择性必修第一册)(已下线)高二上学期期中复习【第三章 圆锥曲线的方程】十二大题型归纳(拔尖篇)-2023-2024学年高二数学举一反三系列(人教A版2019选择性必修第一册)湖南省岳阳市平江县颐华高级中学2023-2024学年高二下学期入学考试数学试题(已下线)第七节 抛物线 第二课时 直线与抛物线的位置关系 核心考点集训