名校
1 . 如图,在四面体OABC中,
,
,
,点
在线段
上,且
,
为
的中点,则
等于( )
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898743591747584/2921312243023872/STEM/dbd47155-7165-4b49-95b1-52756fac90fe.png?resizew=177)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a9cb32a25c2a8bb99f75633b4cd5ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049131856ba841523793ee3d83099014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eca8aa7145b2327dbccba46da05bb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed047057b4761eb26c763f563e39667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd4b9ad667f6da79bc3a5737cbc1eee.png)
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898743591747584/2921312243023872/STEM/dbd47155-7165-4b49-95b1-52756fac90fe.png?resizew=177)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2022-02-21更新
|
496次组卷
|
4卷引用:江西省赣州市宁都县安福中学2022-2023学年高二上学期期末数学试题
解题方法
2 . 如图是一个正三棱柱(以
为底面)被一平面所截得到的几何体,截面为ABC.已知
,
,M为AB中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/419bf13f-84ad-4e39-abd5-decc5e2f39ac.png?resizew=163)
(1)证明:
平面
;
(2)求此几何体的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d9e7dc803dc76b187d9d5d19754c73a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c122ca7141c43c15c783968f5f0dbc19.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/419bf13f-84ad-4e39-abd5-decc5e2f39ac.png?resizew=163)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34cf61780928291d51c7bbb08a5fcf81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
(2)求此几何体的体积.
您最近一年使用:0次
解题方法
3 . 某学校的校车在早上6:30,6:45,7:00 到达某站点,小明在早上6:40至7:10之间到达站点,且到达的时刻是随机的,则他等车时间不超过5分钟的概率是( )
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
4 . 函数
在区间
上有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f248b694c92b8af42ccd68d0ace39eac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b61bb7cb94b4d06f0090df1e365667.png)
A.极大值为27,极小值为-5 | B.无极大值,极小值为-5 |
C.极大值为27,无极小值 | D.无极大值,无极小值 |
您最近一年使用:0次
5 . 椭圆
的长轴长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d80a47fd46072cd717442cb378d431ee.png)
A.3 | B.4 | C.6 | D.8 |
您最近一年使用:0次
名校
6 . 已知函数
,
,当
时,不等式
恒成立,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/605e2f1014570bf34ea21c07c0d039e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6d50c91dca7c2da1974ee0871806b54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-02-11更新
|
1278次组卷
|
4卷引用:江西省赣州市2021-2022学年高二上学期期末数学(文)试题
7 . 有一组样本数据
、
、
、
,由这组数据得到新样本数据
、
、
、
,其中
,
为非零常数,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a79b9eaa5e7ab7a1e5c512b571914dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3bbc51664a4aba4bc6c6140024f2636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
A.两组样本数据的样本平均数相同 | B.两组样本数据的样本标准差相同 |
C.两组样本数据的样本中位数相同 | D.两组样本数据的样本众数相同 |
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2022-02-11更新
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206次组卷
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3卷引用:江西省赣州市2021-2022学年高二上学期期末数学(文)试题
江西省赣州市2021-2022学年高二上学期期末数学(文)试题陕西省榆林市横山中学2021-2022学年高二上学期第一次月考数学试题(已下线)专题10 中位数、平均数、方差、直方图等归类(1) -期末考点大串讲(苏教版(2019))
名校
8 . 已知
:
,有
,
:方程
表示经过第二、三象限的抛物线,
.
(1)若
是真命题,求实数
的取值范围;
(2)若“
”是假命题,“
”是真命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed98d1b20bf77377c1374a3de92f7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99185b6a2495974cacd1f2bc7671141f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd9218a657b17654c5d757a6f7dee9a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2022-02-11更新
|
141次组卷
|
2卷引用:江西省赣州市2021-2022学年高二上学期期末数学(文)试题
9 . 总体由编号为01,02,…,30的30个个体组成.选取方法是从下面随机数表第1行的第5列和第6列数字开始由左到右依次选取两个数字,则选出来的第5个个体的编号为____________ .
6606 5747 1734 0727 5017 3625 2361 1665 1189
1833 1119 9219 7005 8102 0578 6453 2345 6476
6606 5747 1734 0727 5017 3625 2361 1665 1189
1833 1119 9219 7005 8102 0578 6453 2345 6476
您最近一年使用:0次
解题方法
10 . 如图是一个程序框图,执行该程序框图,则输出的n值是( )
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897357386432512/2914034303320064/STEM/cd2e77b9-eedc-4318-8ef1-190b599133ee.png?resizew=140)
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897357386432512/2914034303320064/STEM/cd2e77b9-eedc-4318-8ef1-190b599133ee.png?resizew=140)
A.2 | B.3 | C.4 | D.5 |
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