解题方法
1 . 过圆
内一点
作相互垂直的两条弦
和
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0149cda9a3647b2c528b6d4973c0c364.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255acbc6b5cc229eec8055e0dc2fc4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7bd4e5049fa304e4d352bfe6dee455d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137ce91e0ef40915a8906f812bf113aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0149cda9a3647b2c528b6d4973c0c364.png)
您最近一年使用:0次
解题方法
2 . 在长方体
中,
为
的中点,点
为线段
的中点,则点
到直线
的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e77a8c7f58584125688aa78e04b8f61d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15dc61d5de97b5a40be925b278ae494c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
3 . 双曲线
的左、右焦点分别是
,过
作斜率为
的直线
交双曲线右支于点
,若
垂直于
轴,则双曲线的离心率为( )
![](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/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
4 . 已知
为抛物线
上的动点,点
到
轴的距离为
,点
到直线
的距离为
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942fb5986240efae02bc736a3b41870f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a4b32d388558eb9a9e4f0f2dd57c09.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
5 .
,
,
,则
的大小关系为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6680d904753271c94e420f36d00a9def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304a6faa26da448088cf9da9c9e0115.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ddc603803a09f8bb4f148aea8606d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
6 .
的展开式中,
的系数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c56cd84bd6a078873141f2d6eca6839c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3336c8ed5361c10c37300e41e03f9f2f.png)
A.30 | B.60 | C.120 | D.32 |
您最近一年使用:0次
7 . 某工厂生产过程中产生的废水含有毒物质,需循环过滤后排放,过滤过程中有毒物质的含量
与时间
之间的关系为
,若循环过滤2h后消除了10%的有毒物质,则6h后有毒物质的含量占原有有毒物质的百分比约为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbc72772f31bd8d087f972232685445.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d4413db6e30c6443561a322c464a39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6096be28ece1627d89cc97d6aa3c77c1.png)
A.70% | B.71% | C.73% | D.76% |
您最近一年使用:0次
解题方法
8 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc6cb2f12d9c0904d9d5e1c9eecb0ea1.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac9e298b20a80dc02fe1040fdb9424f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc6cb2f12d9c0904d9d5e1c9eecb0ea1.png)
您最近一年使用:0次
9 . 经过
两点的直线的方向向量为
,则实数
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e5f5a1f83f1395b7d41c98792a0140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6933978223d24fae0e083568d5fa0c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
A.![]() | B.![]() | C.![]() | D.1 |
您最近一年使用:0次
解题方法
10 . 已知两条直线
和
相互垂直,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72872ee4b7c96184e4d269581ca2d763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a1758ed5edf266cc159066462f1ee25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
您最近一年使用:0次