1 . 几何学中,把满足某些特定条件的曲线组成的集合叫做曲线族.点
是椭圆族
上任意一点,如图所示,椭圆族T的元素满足以下条件:①长轴长为4;②一个焦点为原点
;③过定点
,则
的最大值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/147498f7-00dd-4321-8dc4-6a9dad8743a4.png?resizew=187)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e298293515d3c5d8343b668fe8541d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45e51a1df6628da1a46027c97d5beec2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/147498f7-00dd-4321-8dc4-6a9dad8743a4.png?resizew=187)
A.5 | B.7 | C.9 | D.11 |
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2022-11-19更新
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465次组卷
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3卷引用:重庆市第一中学校2023届高三上学期期中数学试题