1 . 正方体
中,
,
分别在
上,且
,
,则下列正确的有( )个
①
,②
,③
,④点
到平面
距离为1
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564a9f661332d97d09e82dfd6f499d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0963c102bfc6da34a4e8c4e16d503065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac240e81e4dbf3097c843b75235ec661.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e89457e4eafe86d2c6f404f967c753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661df691bacf67f20557fef29c1af1eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6469878a955cc09fac22ba5aea3fb962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028856d5101687dd8eaf130846489cfd.png)
A.1 | B.2 | C.3 | D.4 |
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解题方法
2 . 如图,三棱锥
中,
,且平面
平面
,
,
为平面
的重心,
为平面
的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/25/0a763d76-8a5c-4170-9bdc-c86b3c6a19a1.png?resizew=142)
(1)棱
可能垂直于平面
吗?若不可能,说明理由;
(2)求
与
夹角正弦值的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eaf10b924a42867329185ad83c85cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/25/0a763d76-8a5c-4170-9bdc-c86b3c6a19a1.png?resizew=142)
(1)棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
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名校
3 . 已知有
两个盒子,其中
盒装有3个黑球和3个白球,
盒装有3个黑球和2个白球,这些球除颜色外完全相同.甲从
盒、乙从
盒各随机取出一个球,若2个球同色,则甲胜,并将取出的2个球全部放入
盒中,若2个球异色,则乙胜,并将取出的2个球全部放入
盒中.按上述方法重复操作两次后,
盒中恰有7个球的概率是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/7f9e8449aad35c5d840a3395ea86df6d.png)
您最近一年使用:0次
2024-03-26更新
|
2230次组卷
|
8卷引用:江苏省徐州市第一中学2023-2024学年高二下学期4月期中考试数学试题
解题方法
4 . 在正方体
中,
为线段
的中点,点
在线段
上,则直线
与平面
所成角的正弦值的范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/887c49fa-6f23-4808-a250-9f5fd462e828.png?resizew=172)
您最近一年使用:0次
名校
解题方法
5 . 在正方体
中,
,点
满足
,其中
,
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f265a9f6a80157744ca09248f9bd6898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee72261f6901e62dfd0ffe547406544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e2e01346f60857ff635bb766802e57.png)
A.当![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() ![]() |
C.当![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2024-03-03更新
|
968次组卷
|
5卷引用:江苏省徐州市第一中学2023-2024学年高二下学期4月期中考试数学试题
解题方法
6 . 已知抛物线
过点
,直线l与C交于A,B两点,且
.
(1)当l垂直于x轴时,求
的面积;
(2)若
,D为垂足,求点D到直线
的距离的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dbcf0320d94734aedd3d4e2e31b9827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83640592853a53872d7af69c0cffc1bb.png)
(1)当l垂直于x轴时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545e18836bc7fee22f8f813a6f525d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93177a5ab81d1dd3969dac51ccf41880.png)
您最近一年使用:0次
7 . 已知双曲线
的左、右焦点分别为
,点P在C的右支上,过点P的直线l与C的两条渐近线分别交于点M,N,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c75eba5051fb2a61e0f5ac08e658d8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
A.![]() |
B.与C仅有公共点P的直线共有三条 |
C.若![]() ![]() |
D.若l与C相切于点![]() ![]() |
您最近一年使用:0次
名校
8 . 已知函数
.
(1)当
时,试判断
的单调性;
(2)若
,且a的取值集合中恰有3个整数,求b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94edffcc1579d33e5d0274b5c35127f7.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
您最近一年使用:0次
2024-01-24更新
|
240次组卷
|
3卷引用:江苏省徐州市2023-2024学年高二上学期1月期末抽测数学试题
名校
9 . 若实数t是方程
的根,则
的值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcbc4641c1c982ed3c4bf802264ef776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9b352fba6c430c7202529924885de8.png)
您最近一年使用:0次
2024-01-24更新
|
873次组卷
|
4卷引用:江苏省徐州市2023-2024学年高二上学期1月期末抽测数学试题
10 . 已知函数,
.
(1)求使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa18838a13fda4e45612c32cdf98b71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f01281f38c1168109c2cc0542acca11b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b518cfbdfcf0a2fd0e7a4881ae0d45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次