解题方法
1 . 已知向量
、
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770ce835ba3671d6bb551abe81038b6d.png)
且
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404067afb19bd74f447a6c0c832af1da.png)
则向量
与
的夹角为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770ce835ba3671d6bb551abe81038b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05250abe6da85eb0b555948d7dbaf317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29276b43a2950ed71f0f9629a35dfa74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404067afb19bd74f447a6c0c832af1da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05250abe6da85eb0b555948d7dbaf317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
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2 . 已知定义在
上的奇函数
,当
时,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4ba8354b20ecf73e7c20db744029365.png)
________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e77edbb8f34dceb468a3b093306c979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be315e528951120e7d551f654d2a1f5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4ba8354b20ecf73e7c20db744029365.png)
您最近一年使用:0次
3 . 已知向量
的夹角为
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290710d643ab6cd3b9edd73815b1d8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5fafcc824b5cfb2d830a9e0adc2de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0265263565db5076958f2f9a95566a7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d6fce004c47849c29ebd8d5d7c16e98.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 数据12,14,15,17,19,23,27,30,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f10551524cd673a9fce3778b7d20f21.png)
________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ff0581cc9493737267f475272c3b03.png)
________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f10551524cd673a9fce3778b7d20f21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ff0581cc9493737267f475272c3b03.png)
您最近一年使用:0次
解题方法
5 . 棱长为2的正方体内切球的表面积为_______ ,棱长为3的正方体外接球的体积为_______
您最近一年使用:0次
6 . 已知函数
.
(1)求m;
(2)判断并证明
的奇偶性;
(3)判断函数
在
是单调递增还是单调递减?请证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e90699929b48afc7837f4e6c9b8b6e71.png)
(1)求m;
(2)判断并证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/189b2da6c420bf8f8900002d14f65f72.png)
您最近一年使用:0次
7 . 设集合
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf52c448917eb20d9058a621eabed251.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e60375f97ff7854f4d3a8b1108d2e3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
8 . 在正四棱锥
中,
分别是
的中点,过直线
的平面
分别与侧棱
交于点
.
![](https://img.xkw.com/dksih/QBM/2023/11/22/3373398996164608/3388586840621056/STEM/89f802a55ba745cc8e40ab79726780ee.png?resizew=192)
(1)求证:
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df7fc746f8c4801d8f2f0471ba3297e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930e85bc9f73e86cfb6ce9b076433f1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://img.xkw.com/dksih/QBM/2023/11/22/3373398996164608/3388586840621056/STEM/89f802a55ba745cc8e40ab79726780ee.png?resizew=192)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9948a4eeae82dd50df79cf3c746adf31.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828247a3338571cb0d4ba2a5bf88929c.png)
您最近一年使用:0次
解题方法
9 . 已知函数
是定义在R上的奇函数,满足
,且当
时,
,则
=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d78dec1c1e00ec02d7bdaf76ef8901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8b527865aefa9186462f2ad4a72617.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1356529b99240cf586a0ee624be73c99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f16274ed3be91f1c9b7abe08990442cf.png)
A.0 | B.1 | C.![]() | D.![]() |
您最近一年使用:0次
10 . 设集合
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306ad2945460e4d1fa6776ac38b6d3c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e60375f97ff7854f4d3a8b1108d2e3.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次