已知点
分别为椭圆
的左顶点、右焦点,点
为
上一点,且
为
的平分线,
,则
的内切圆的半径为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8348c89c6f13053325f4e1c62e29a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279cefeb5c389a37a71e5fd3925f5954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2405fa51f897fac1ca37c301ec3a414f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5568d1d31222b1c115ea28d50e993e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef6516358878a47560b1d9eff2d5c09.png)
A.![]() | B.![]() | C.![]() | D.![]() |
2024·全国·模拟预测 查看更多[1]
(已下线)高考2024年普通高等学校招生全国统一考试·预测卷数学(三)
更新时间:2024-04-29 12:43:02
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单选题
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适中
(0.65)
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【推荐1】在
中,角A,B,C所对的边分别为a,b,c,下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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【推荐2】若△ABC的三边为a,b,c,它的面积为
,则内角C等于
![](https://img.xkw.com/dksih/QBM/2014/1/3/1571459601514496/1571459607101440/STEM/06d85ede69554c7984c962b7248f6fc2.png)
A.30° | B.45° | C.60° | D.90° |
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解题方法
【推荐1】设
为双曲线
与椭圆
的公共的左右焦点,它们在第一象限内交于点
是以线段
为底边的等腰三角形,若椭圆
的离心率范围为
,则双曲线
的离心率取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8664e94c5793590f8d478e20908317c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f58919345f00c8207ad64d8a93ecd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2272b79f0f2183ddd6c0ac7ba31cc5c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知双曲线
)的左,右焦点分别是
,
,直线
过点
,且与双曲线
在第一象限交于点
.若(
(
为坐标原点),且
,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/f5076289823db419f94e9c0c8f4aafd9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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