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1 . 已知抛物线
,
为
的焦点,过焦点
且倾斜角为
的直线
与
交于
,
两点,则下面结论不正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.以![]() ![]() ![]() |
B.![]() |
C.过点![]() ![]() ![]() |
D.记原点为![]() ![]() |
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2 . 如图,已知
的三个顶点均在抛物线
上,AB经过抛物线的焦点F,点D为AC中点.若点D的纵坐标等于线段AC的长度减去1,则当
最大时,线段AB的长度为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/974389bc-6155-426b-8bcb-2ac277122828.png?resizew=168)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ed24d7acba0b3a7ebf4d520296424a3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/974389bc-6155-426b-8bcb-2ac277122828.png?resizew=168)
A.12 | B.14 | C.10 | D.16 |
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2020-03-24更新
|
706次组卷
|
4卷引用:云南省普洱市景东彝族自治县第一中学2019-2020学年高一月考数学试题
云南省普洱市景东彝族自治县第一中学2019-2020学年高一月考数学试题2020届福建省漳州市高三3月第二次高考适应性测试数学(理)试题(已下线)强化卷03(3月)-冲刺2020高考数学之拿高分题目强化卷(山东专版)广西南宁二中2020届高三4月开学考试理数试题
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3 . 已知不过原点的直线l与抛物线C:
交于A,B两点,若
,且
,则直线l的斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0830f11f09cc2e402f54607a7139fe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1d660d961bcf4642035743d95e3a51b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ad3fa4a6c22638edb586bb2fa8df386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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