已知双曲线
1(a>0,b>0)上一点C,过双曲线中心的直线交双曲线于A,B两点,记直线AC,BC的斜率分别为k1,k2,当
ln|k1|+ln|k2|最小时,双曲线离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c849bd2d30a190b8a8ca873058205ef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4813a34e23c5dac4a2ceb246eeb127d7.png)
A.![]() | B.![]() | C.![]() | D.2 |
更新时间:2020-03-18 00:27:22
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解题方法
【推荐1】定义在R上的函数
满足
,当
时,
函数
.若
,
,不等式
成立,则实数m的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7a758abe9fe3a0c6c458cb015f70ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1af83405d0098ee50062e0cedc40e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffb317f4732093057f90f4c3235acee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8507cf0a3c20d3b521e69bcd580c0223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/599c4c6564811fea2e57b692ef00b4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc26cca6615b6136d21fd9cf71ccb89e.png)
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【推荐2】已知
、
都是定义域为
的连续函数.已知:
满足:①当
时,
恒成立;②
都有
.
满足:①
都有
;②当
时,
.若关于
的不等式
对
恒成立,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d32d0ff41a0d24f64425001363c037d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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【推荐1】已知双曲线
过其右焦点F的直线交双曲线于P,Q两点,线段PQ的中垂线交x轴于点M,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf7a542cbf8cc9a9631d11da509932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986b5935cba36b2b001c388bc1d68111.png)
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【推荐2】已知
为双曲线
上的动点,
,
,直线
:
与双曲线的两条渐近线交于
,
两点(点
在第一象限),
与
在同一条渐近线上,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22962a2ad892cb6b14ab039a06e8cdc6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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