名校
1 . 若m,n是关于x的方程
的两根,且
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d57932f95fd3c5d395bd249727b805c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7961cbe98aac6a5fdee94582c341b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2 . 如图,四边形
为平行四边形,反比例函数
的图象经过点A且与线段
交于点D.连结
,若四边形
的面积是四边形
面积的
,则点A的横坐标与点D的横坐标之比为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d439e428bc3bf8778c274dd683f4fde9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/23/99a6e5d8-c053-44b3-a851-b87ce5625b48.png?resizew=146)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 如图①,抛物线
与x轴分别交于点
、
,与y轴交于点C,
.
(1)求抛物线的解析式;
(2)点P是抛物线在第一象限上的一个动点,当四边形
的面积最大时,试求点P的坐标;
(3)如图②,在(2)的条件下,圆心在第一象限且经过O、P两点的动圆
与x、y轴分别交于点M、N,试问:
的值是否会发生变化?如果不变,请求出
的值;如果变化,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7291b3d921f595f28960abcdce6dfbed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f29fd6469edfca897975cae28eedf1a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/23/f93a4b47-e212-4432-a613-4653ca21493c.png?resizew=446)
(1)求抛物线的解析式;
(2)点P是抛物线在第一象限上的一个动点,当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f7c674f87a67fde99afceb3cfd8189.png)
(3)如图②,在(2)的条件下,圆心在第一象限且经过O、P两点的动圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ae3c0fbf7d162b0293a03c29c027fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ffca492d5f4cc72de4d9d00f95a4d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ffca492d5f4cc72de4d9d00f95a4d0.png)
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名校
4 . 如图,直线
与抛物线
的图象都经过y轴上的D点,抛物线与x轴交于A,B两点,其对称轴为直线
,且
.直线
与x轴交于点C(点C在点B的右侧).则下列判断:①
;②
;③
;④
;⑤
中,正确的是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffe3400ea9733d0a16ffa44dc0fab4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c35c43d90814396ff06336fa45e9650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffe3400ea9733d0a16ffa44dc0fab4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727b2f9ed96487c6d08bc26e647f76d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ddda0910855d8aceb007c598f6e16fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc4f9d84d62fff4d43ef15dccfb35af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe67a36e04a834d1b216614f06d7d566.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/23/6c0a7228-1aa3-4600-8843-4121bc8cb657.png?resizew=184)
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2023-07-05更新
|
81次组卷
|
2卷引用:广东省佛山市顺德区第一中学2020-2021学年高一上学期新生入学数学试题
名校
5 . 如图,直线
与坐标轴交于A,C两点,过A,O,C三点作
,点E为劣弧
上一动点(不与A,O两点重合),连结
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1618f254adeb57bcf83bab32b6c792b7.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9ecf67f53e3f0b5c54a8233c44d6562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0385df6c7f8ee7ab503b6ed35933695b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1618f254adeb57bcf83bab32b6c792b7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/23/1e4e0736-6e91-4f4c-8eb1-a8c99c68de08.png?resizew=159)
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名校
6 . 直线
与x轴、y轴分别交于点A与点B,点C、D分别为
、
的中点,点P为y轴上一动点,当
的值取到最小值时,点P的坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c48042e88209a28f891b29768bf3fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186dee1a1cf68677d143172a2a50709c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023-07-05更新
|
87次组卷
|
2卷引用:广东省佛山市顺德区第一中学2020-2021学年高一上学期新生入学数学试题
名校
解题方法
7 . 已知
,设
,
,则a____________ b.(填<,≤,≥,>其中一种)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df11e8e73867030832027ebf06c7f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa616d0102c7ecc0309a17b4cef3887e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721a3eaaef842c797dcee7385d53ab8c.png)
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2022-10-19更新
|
226次组卷
|
2卷引用:广东省佛山市南海区桂华中学2022-2023学年高一上学期第一次段考数学试题
名校
8 . 如图1,AB为⊙O的直径,点P是直径AB上任意一点,过点P作弦
,垂足为P,过点B的直线与线段AD的延长线交于点F,且∠F=∠ABC.
![](https://img.xkw.com/dksih/QBM/2022/8/3/3036407790297088/3042341699436544/STEM/1f38f551e5a54e12bfa08392d396732b.png?resizew=302)
(1)若CD=
,BP=4,求⊙O的半径;
(2)求证:直线BF是⊙O的切线;
(3)当点P与点O重合时,过点A作⊙O的切线交线段BC的延长线于点E,在其它条件不变的情况下,判断四边形AEBF是什么特殊的四边形?请在图2中补全图象并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://img.xkw.com/dksih/QBM/2022/8/3/3036407790297088/3042341699436544/STEM/1f38f551e5a54e12bfa08392d396732b.png?resizew=302)
(1)若CD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
(2)求证:直线BF是⊙O的切线;
(3)当点P与点O重合时,过点A作⊙O的切线交线段BC的延长线于点E,在其它条件不变的情况下,判断四边形AEBF是什么特殊的四边形?请在图2中补全图象并证明你的结论.
您最近一年使用:0次
9 . 某超市计划购进一批甲、乙两种玩具,已知5件甲种玩具的进价与3件乙种玩具的进价的和为231元,2件甲种玩具的进价与3件乙种玩具的进价的和为141元.
(1)求每件甲种、乙种玩具的进价分别是多少元?
(2)如果购进甲种玩具有优惠,优惠方法是:购进甲种玩具超过20件,超出部分可以享受7折优惠,若超市购进x(x>0)件甲种玩具需要花费y元,求y与x的函数关系式;
(3)超市打算购买x(x>20)件玩具,在(2)的条件下,从甲、乙两种玩具中选购其中一种,请你帮助超市判断购进哪种玩具更省钱?
(1)求每件甲种、乙种玩具的进价分别是多少元?
(2)如果购进甲种玩具有优惠,优惠方法是:购进甲种玩具超过20件,超出部分可以享受7折优惠,若超市购进x(x>0)件甲种玩具需要花费y元,求y与x的函数关系式;
(3)超市打算购买x(x>20)件玩具,在(2)的条件下,从甲、乙两种玩具中选购其中一种,请你帮助超市判断购进哪种玩具更省钱?
您最近一年使用:0次
2022-08-11更新
|
87次组卷
|
2卷引用:广东省佛山市顺德区第一中学2019-2020学年高一上学期入学测试数学试题
10 . 如图所示,小明家小区空地上有两棵笔直的树
、
.一天,他在
处测得树顶
的仰角
,在
处测得树顶
的仰角
,线段
恰好经过树顶
.已知
、
两处的距离为2米,两棵树之间的距离
米,
、
、
、
四点在一条直线上,求树
的高度(
,
,结果保留一位小数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf16b9529102652f061bd162c8ec1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6df86c5e4c75297d3b4b6126552053d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0268d04b9dea7629af27af9a0285a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a7ff6bb8000946da9599d7d903ac9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a929d0d84e3654f03694adc8d1a326e.png)
![](https://img.xkw.com/dksih/QBM/2022/8/3/3036407790297088/3042341699223552/STEM/895dd4bccf1e44e4812f6a866e751296.png?resizew=156)
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