解题方法
1 . 在
中,内角
、
、
的对边分别为
、
、
,点
在边
上,且
,
.
(1)求
的值;
(2)若
,
的面积为
,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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b6bef27de230acad352f25e954f4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c800b6aabdc453e2c7e343061e9c6a78.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4239165ee886662653d8da4c567a79d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46ee1a2fc4d7faddba8787d55b699bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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解题方法
2 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8cbd62423312623273226d1e96f2d05.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07bc2537e9305efa673ee56fc3ef7e1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8cbd62423312623273226d1e96f2d05.png)
您最近一年使用:0次
2023-01-09更新
|
1285次组卷
|
3卷引用:重庆市2023届高三学业水平选择性考试模拟调研(二)数学试题
名校
解题方法
3 . “
”是“直线
与直线
平行”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed39f5aca78934fb383402433fe549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1111fea5c47ce1fdfc9ec28ac370955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8b52b2f8f693789e25e15b4e6e5d32.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 |
您最近一年使用:0次
2023-01-09更新
|
857次组卷
|
7卷引用:重庆市2023届高三学业水平选择性考试模拟调研(二)数学试题
解题方法
4 . 已知随机变量
服从正态分布
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b4aa1500872b81bf0bcbbd14ae5da7.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c1add9e8dac346efb4053eb270618c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cfe20644620e0438f6ff3b245280918.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b4aa1500872b81bf0bcbbd14ae5da7.png)
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解题方法
5 . 已知等差数列
的前
项和为
,
,且
、
、
成等比数列.
(1)求
;
(2)求数列
的前
项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87446f4955379282b0374393d632dc7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7da2f386b78cdf6489efaa2f5820d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da4cd81500bdb43118150dbdb1541e6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91adba8efbf964e9e35547b0fd0ea36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
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解题方法
6 . 已知函数
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76885823adc32c8441247b3796c9f0cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6993b61c23883fdad0abf69b9cd245d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
7 . 已知正四棱台的上下底面的边长分别为
和
,高为3,则该正四棱台的外接球的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd905fb4dd19b5cae348ecb12845f9ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354ec8391bdd39377804ee4dab1d8f1c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
8 . 设
,集合
,
,
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934524e431c42cfdd93b73702044e24f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af9527f5f4351e0783939ddaeda85a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf22d7d1a965bda25168a233fb6290c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
9 .
年
月
日,郑渝高铁实现全线贯通运营.郑渝高铁北起河南省郑州市,南至重庆市,途经河南、湖北、重庆三省市,全长
公里,此前,北京到重庆的高铁列车耗时
小时
分,现在只需
小时
分;石家庄至重庆高铁的耗时由
小时
分缩短至
小时
分,郑州至重庆的耗时由
小时
分缩短至
小时
分,不仅如此,郑渝高铁还是一条旅游线,串联起了嵩山少林寺、襄阳古隆中、神农架原始森林、巫山大小三峡、奉节白帝城等众多著名旅游景点. 现有一列郑渝高铁从重庆北发出,某节车厢内共有
位旅客,每位旅客等可能地从云阳、奉节、巫山、巴东、神农架、襄阳东共
个车站中选择一站下车,且彼此独立.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/d6826218-43a1-481f-a608-56d1d262f53d.png?resizew=387)
(1)求这
位旅客选择下车的车站互不相同的概率;
(2)设这
位旅客选择下车的车站共有
个,求
的分布列和期望.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d01dd350dc95f42f1883e0cc7aae084.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1d3a6f58b0c3f6384c5b66c4e4f226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0b71b8d2c183154221f717ce09077b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0b71b8d2c183154221f717ce09077b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8f70f0c1b960fa850d67c4091e04400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e180966d709439a215f1232d17aedf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2f0486c5492c0a71c2e63edcb60033.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbbecbd7e92dcbe1766462fcf40066de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f592748753dbbbd747a14a94a2dea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/d6826218-43a1-481f-a608-56d1d262f53d.png?resizew=387)
(1)求这
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
(2)设这
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
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10 . 过抛物线
的焦点且倾斜角为
的直线交抛物线
于
两点,则线段
的中点到抛物线
的准线的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.8 | B.![]() | C.4 | D.![]() |
您最近一年使用:0次