1 . 如图所示,已知菱形
和矩形
所在平面互相垂直,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/22/5114eebd-0d33-4333-8d91-2838fc08561d.png?resizew=222)
(1)证明:平面
平面
;
(2)设
中点为
,求直线
与底面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26eba7e649fade39fd2d0b6ef4ac5ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6370d6c626bdabf1fc694501ee6c714f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/22/5114eebd-0d33-4333-8d91-2838fc08561d.png?resizew=222)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42ce82a4c37365f2d4dea2c4ad2e3288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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2 . 设向量
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0249a6171c0f2a453ca2aae0941b7c4e.png)
,令
,
的最小正周期为
.
(1)求
的最小值,并写出此时
的取值;
(2)若
时,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d2360926d8f2e85fb3f81a0f5a3fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0249a6171c0f2a453ca2aae0941b7c4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ddbb5cfaedab59c97125105c3fe590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be2dd167392a87d125bfd91ab3cb396.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddcfe70fcf6c4adf6fd7b02911c2cd36.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aea808279858d429a98769002326cd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa13c78a831522cb94e02766f83c8ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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3 . 函数
在区间
的图象大致为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f6ca2aaad24eb0eebff2fd9fadd771f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f18ff8e7d79aa9bc435fabde17d4be7a.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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5卷引用:江西省景德镇一中2021-2022学年高一(普通班)下学期期末考数学试题
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4 . 下列说法中正确的是( )
A.空间内两两相交的三条直线确定一个平面 |
B.若直线![]() ![]() ![]() |
C.两组对边相等的四边形是平行四边形 |
D.若平面![]() ![]() ![]() ![]() |
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3卷引用:江西省景德镇一中2021-2022学年高一(普通班)下学期期末考数学试题
江西省景德镇一中2021-2022学年高一(普通班)下学期期末考数学试题辽宁省朝阳市建平县实验中学2022-2023学年高二上学期第二次月考数学试题(已下线)第一章 点线面位置关系 专题二 空间垂直关系的判定与证明 微点2 空间直线垂直的判定与证明综合训练【基础版】
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5 . 已知复数
,
,若
不是实数,则实数
满足_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d36f59f5d8e0caafa6055dee7ebb74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673fd49e2aa38a3cddfddfae6bee62cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe615164ed2995bdeea0f5b0ba94231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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6 . 已知复数
,
为虚数单位.
(1)求
;
(2)若复数
的实部为1,
为实数.求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/262bbc01093731afabbf8bdd8de015eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41042207515dd2e8349c805e6aee400.png)
(2)若复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92d861f3e91317a6d2098a5d9b7a97d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
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7 . 圆锥底面半径为2,母线长为4,则圆锥内半径最大的球的表面积为__________ .
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8 . 已知
,
且
,则向量
在
方向上投影为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473f40c9b5f3778b99cd44b43a43e92c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a7db8e47a8abfcba931932d565ed63f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fcb3a08974ade5d1697c0bf4a6f223c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
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9 . 已知随机变量
服从正态分布
(100,100),则下列结论正确的是( )
(若随机变量
服从正态分布
,则
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27cb3f130a313826b91b2c88ea98cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(若随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb6a29f4013103da2c342eda2f105fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c16c7a75892889f641dcb03e0ce18d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27cb3f130a313826b91b2c88ea98cea.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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10 . 若对任意使得关于
的方程
有实数解的
均有
,求实数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46513e2b1c7e8deceac348e59a70f89f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f2599ca8b6b683e57a82699c8b1ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1138b810248f56407bff47983095217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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