1 . 如图,在底面
是矩形的四棱锥
中,
,点
在底面
上的射影为点
与
在直线
的两侧
,且
.
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d01f7f3bd1c701bf81f4a775136c5443.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aad2041eace3c1f44542d2afcab2dcf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae890f9e8b32aa53a54158f24f4a87bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de4e813c2b7a248470b1ebef5b8bdcb4.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4d781525777c7b5284dffc70b2a28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b489c25405ce48699d4f0a62820bed.png)
您最近一年使用:0次
名校
解题方法
2 . 6人站成一排,其中甲、乙两人中间恰有1人的站法有( )
A.240种 | B.192种 | C.144种 | D.96种 |
您最近一年使用:0次
7日内更新
|
511次组卷
|
3卷引用:河南省九师联盟2024届高三下学期5月联考数学试题
名校
解题方法
3 . 下列命题正确的是( )
A.已知变量![]() ![]() ![]() ![]() ![]() |
B.数据4,6,7,7,8,9,11,14,15,19的![]() |
C.已知随机变量![]() ![]() |
D.已知随机变量![]() ![]() |
您最近一年使用:0次
2024-06-08更新
|
540次组卷
|
2卷引用:河南省九师联盟2024届高三下学期5月联考数学试题
解题方法
4 . 已知函数
.
(1)若曲线
在其上一点
处的切线的倾斜角为
,求
的解析式;
(2)若
,不等式
恒成立,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025001679461ff4242a2667ed7d0e80d.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afb80007983e5b99dcdeebf87d18ff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ef7629fe45bf6af93bb0b6523e3837e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d812643e080d4d447fab7fe2ae2646.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc8010942f8ff56e4826c1e6b0abe6b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ab7024f73ff0cb7e6a48197538a91e.png)
您最近一年使用:0次
名校
解题方法
5 . 已知双曲线
的左、右焦点分别为
,
,过点
的直线与双曲线的左、右两支分别交于A,B两点,若
,
,则C的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5546ac9f1ee485e6d0829c9eec8c0afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfdc4b23cd18862260c341e7db9ff3a3.png)
您最近一年使用:0次
2024-06-04更新
|
378次组卷
|
2卷引用:河南省许昌市魏都区许昌高级中学2024届高三下学期5月月考数学试题
名校
解题方法
6 . 在平面直角坐标系xOy中,
为曲线
上任意一点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1fc7467034cd54ad48d03ddeeb4dec8.png)
A.E与曲线![]() | B.P点不可能在圆![]() |
C.满足![]() ![]() | D.P到x轴的最大距离为![]() |
您最近一年使用:0次
2024-06-04更新
|
252次组卷
|
3卷引用:河南省九师联盟2024届高三下学期5月联考数学试题
7 . 已知正三棱锥
的三条侧棱长均为
为侧棱
的中点,
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba964c27f118895f13672321aebe5f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b4424cb0af429b92e1fc168c4c70de4.png)
A.平面![]() ![]() ![]() |
B.三棱锥![]() ![]() |
C.三棱锥![]() ![]() ![]() |
D.直径为![]() |
您最近一年使用:0次
解题方法
8 . 若一个两位正整数
的个位数为6,则称
为“幸运数”.
(1)对任意“幸运数”
,证明:
能被6整除;
(2)已知集合
.
①若
,证明:
;
②若“幸运数”
,则称数对
为“亲密数对”,规定:
,求小于50的“幸运数”中,所有“亲密数对”的
的所有值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)对任意“幸运数”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b044c1df8d6021eccebd4e9120f232.png)
(2)已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45e5dc7f66a23728165409821aaca1b3.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf58d3883bcd6273dc624a0abef69f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783f369011a6d18f3b14c8d8ed171fb.png)
②若“幸运数”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a0ac8b620b5eca9daa7276712935ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/698c4d4e50062b4a7dd70fe1b4ab4fd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04e0d26b41dcdbe19680eade8702c0a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8f884759486947e0215402e45ed0a2e.png)
您最近一年使用:0次
名校
解题方法
9 . 设函数
的函数值表示不超过x的最大整数,则在同一个直角坐标系中,函数
的图象与圆
(
)的公共点个数可以是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1550a97c21c1d71c9e95dde569668be0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6bd56acbaed7465cc7b453fdccc0aef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
2024-05-25更新
|
2093次组卷
|
2卷引用:河南省焦作市博爱县第一中学2024届高三下学期5月月考数学试题
名校
解题方法
10 . 已知函数
.
(1)若
对
恒成立,求
的取值范围;
(2)当
时,若关于
的方程
有三个不相等的实数根
,
,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/139ccda5ac5ed8c01bd0e87e84d30e09.png)
,求
的取值范围,并证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25af1b7613f714301020bb09a33d8fe8.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427ddc261e4aea13a25fa479749f4074.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e82c4003d20b36777f7aea584e3dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82c5f6fe92b97f07fb31b118fa97b11a.png)
![](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/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/139ccda5ac5ed8c01bd0e87e84d30e09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ebb401767499a3b5eedf56cb36b4127.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae9e12d9f9b1dbd7a1ad8fffe752f5e7.png)
您最近一年使用:0次
2024-05-22更新
|
215次组卷
|
2卷引用:河南省九师联盟2024届高三下学期5月联考数学试题