解题方法
1 . 已知随机变量
,若
,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c1ed67167078ea4f5f1ee53ee14164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f8722446a0c628568e5a5e47c77b0c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
您最近一年使用:0次
2 . 若
,则数列
的前n项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78a26e3eeac053424c52ab90f6a3490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7fece9768f5455d2e5e37b628af9d0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
您最近一年使用:0次
名校
解题方法
3 . 设
,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e72f6b2ef3329828cb8fc873eeba7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9745f117d6195d82a7093a8b7ac5726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d18d5cc420cc3e8a0cc612db4d9b9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eb6355c7ddd1c545ccf474bb551f095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
您最近一年使用:0次
名校
4 . 已知正数
满足
,若
恒成立,则实数
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d708cb763716467219215cdc0782c0a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45900deae0489e87fe448948e8091c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d9e6cde7171d0f82520a48fcd8605f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
5 . 已知直线
的斜率为2,且与曲线
相切,则
的方程为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b05b0ddef69b72c4dbcd37135a4a8fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
名校
6 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df558289b30e640381bbf406fae2babf.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df558289b30e640381bbf406fae2babf.png)
您最近一年使用:0次
7 . 已知椭圆
的左、右焦点分别为
为坐标原点,点
在
上,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be68669e8cde95b6f844477a2acfb1e3.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36813cb202ce58fe040236436b1d8dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447120a38d5e15d7a01d36231d648d7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5918ee27201b342fab2009e7f9d12da6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be68669e8cde95b6f844477a2acfb1e3.png)
您最近一年使用:0次
解题方法
8 . 已知双曲线
的左、右焦点分别为
,点A在双曲线C上,点B在y轴上,
,则双曲线C的离心率为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64d09618f2c296395ff7d7410f4e6189.png)
您最近一年使用:0次
解题方法
9 . 已知实数x满足不等式
,则函数
最大值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79d859f485d384ee8739b04b728fd90d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e943656b08a2bcf910e91f422c569bf7.png)
您最近一年使用:0次
解题方法
10 . 已知
是双曲线
的右焦点,圆
与双曲线C的渐近线在第一象限交于点A,点B在双曲线C上,
,则双曲线C的渐近线方程为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41b96eda0601673fafb836643969914f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76eca66a13eeabe79410c25eb56a630f.png)
您最近一年使用:0次