1 . 抛物线
与y轴交于点
且过点
,其中
,连接
.
(1)当
时,求抛物线解析式和其顶点的坐标;
(2)当
时,若点M为抛物线
上位于直线
上方的一点,过点M作直线
的垂线,垂足为N.求
的最大值和此时点M的坐标;
(3)已知点
,点
,若点P在线段
上,且
,连接
,
,当
的最小值为
时,直接写出此时b的值和点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ba23d524dc2a51f2a2f5a2eec842f22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54038e3709e38e1a86fb0bc3980c72fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bd45d81ca9f4fbfdad7642e2016ea11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb80ec1260ba8cfd58074f7d06d9612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a71a658362bd9faa329c3d9f6e6d2c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68abf671ba1bc7cbf2704f1dfde481d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ba23d524dc2a51f2a2f5a2eec842f22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e66f43e3eaae0440c0a086cd0092ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39de85358f48bc707cf78ce266115be7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a7441ff967bfdb11ced2603ecc488a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fe5fb32d05389601d8c53df7baaec6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2793aa39b517d1a5e7ca2d8243710c8f.png)
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2 . 在平面直角坐标系中,
为原点,点
,点
,把
绕点
逆时针旋转得到
,点
、
旋转后的对应点为
、
,记旋转角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/1b5b9334-5ca7-4206-a7e2-d30ef5a5c091.png?resizew=418)
(1)如图①,若
,求
的长;
(2)如图②,若
,求点
的坐标;
(3)如图③,
为
上一点,且
,连接
、
,在
绕点
逆时针旋转一周的过程中,求
面积的最大值和最小值(直接写出结果即可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ba33de35567ff6f8c15e7e0d37aa590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1a682ceca64f8b53216746fb76f3e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8bfc9876ec81b013fd71a46c3e033b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/1b5b9334-5ca7-4206-a7e2-d30ef5a5c091.png?resizew=418)
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
(2)如图②,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
(3)如图③,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/156e9b10ab97a8b56a9924b9c8bba059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f78322f1db1b2e332225b9db53b9c54a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b3f7368811340328acf5be13f499d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ec46ccffcce226e3551c7f82d50ef2.png)
您最近一年使用:0次
名校
3 . 已知抛物线
与
轴交于点
,
,与
轴交于点
,连接
,点
是此抛物线的顶点.
(1)求抛物线的解析式;
(2)抛物线上
两点之间的距离是 ;
(3)①:点
是第一象限内抛物线上的动点,连接
和
,求
面积的最大值;
(4)在①的条件下,当
的面积最大时,
为
轴上一点,过点
作抛物线对称轴的垂线,垂足为
,连接
,探究
是否存在最小值.若存在,请直接写出此时点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f998f27d8fc98ad8733bbcc3be0f482a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fe2c124d5bbbbe666ee145cd454b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)求抛物线的解析式;
(2)抛物线上
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
(3)①:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
(4)在①的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0128767f9d4f970c22fc993963cf3853.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41a7e8e87d79284b15549c5f553a829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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4 . 将一个直角三角形纸片
放置在平面直角坐标系中,点
,点
,点
在
轴正半轴上,
,点
在边
上
点
不与点
,
重合
,过点
作
的平行线交
轴于点
.
的坐标为 ;若
,则点
的坐标为 ;
(2)以
为折痕折叠该纸片,点
的对应点为
,设
和
重叠部分的面积为
.
①如图②, 当
和
重叠部分为四边形时,
交
于点
,
交
于点
,试用含有
的式子表示
和
重叠部分的面积
,并直接写出
的取值范围;
②填空:当
时,
的最大值为 ,
的最小值为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a44aa6beb0b8948618d252e7b765de6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fd82afe2c89ba2d0fd1c1d4c22a2b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f2b9a476097cd6741ff549204715e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3b136c45d114d9432aa492909cda4f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2bdee85c24c1178b83b4ffc09e7aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a66a45b7eff00a1770f99006e0024290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbfea1ad9e41256cd39c3d79a5d1df72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
①如图②, 当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ed6bee57f4526320197d6a7474386f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbfea1ad9e41256cd39c3d79a5d1df72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41327aab1b961943b92e8fa5e9747386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/871e593319645569c1b2708cf7986c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ed6bee57f4526320197d6a7474386f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbfea1ad9e41256cd39c3d79a5d1df72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
②填空:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70d25af8316a814856a7e23216b8f3af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
名校
解题方法
5 . 已知抛物线
与
轴相交于A、B两点(点A在点B右侧),与
轴相交于点C,点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/5a86f456-5269-4403-9a20-814869845904.png?resizew=302)
(1)求抛物线的顶点坐标;
(2)若点
是第二象限内抛物线上一动点,过点
作线段
轴,交直线
于点
,当线段
取得最大值时,求此时点
的坐标.
(3)若取线段
的中点
,向右沿
轴水平方向平移线段
,得到线段
,当
取得最小值时,求此时点
的坐标
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e21b859aa2b074e8c13711320c414a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4218690b49de906a22dda72c578956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/5a86f456-5269-4403-9a20-814869845904.png?resizew=302)
(1)求抛物线的顶点坐标;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b1da9046b4cb82135a4a1eaa528c53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)若取线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7737c6ad84234464b8cd1a72f7a5c5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b365dbf8d6b88157a7cba9fb1bc120e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
您最近一年使用:0次
2023-12-26更新
|
455次组卷
|
2卷引用:天津市集贤里中学2023-2024学年九年级上学期第二次月考数学试题
名校
6 . 如图,一条抛物线与x轴相交于M、N两点(点M在点N的左侧),其顶点P在线段
上移动,若A、B的坐标分别为
,点M的横坐标的最小值为
,则点N的横坐标的最大值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/de4f75da-1155-4a39-be99-c2a3fa671a5a.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/697c929222d3086e1c9556c3b3381ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/de4f75da-1155-4a39-be99-c2a3fa671a5a.png?resizew=164)
A.3 | B.4 | C.5 | D.6 |
您最近一年使用:0次
2023-12-01更新
|
303次组卷
|
9卷引用:天津市南开区南开翔字学校2019-2020学年九年级上学期10月月考数学试题
天津市南开区南开翔字学校2019-2020学年九年级上学期10月月考数学试题天津市天津外国语大学附属外国语学校2023-2024学年九年级上学期第一次月考数学试题吉林省东北师范大学附属中学2018-2019学年九年级第二次综合测试数学试题吉林省长春市解放大路中学2019-2020学年九年级上学期期中数学试题吉林省长春市2023-2024学年九年级上学期期中数学试题北京市朝阳区北京师范大学三帆中学朝阳学校2023-2024学年九年级上学期期中数学试题河北省石家庄市第八十一中学2023-2024学年九年级上学期12月月考数学试题吉林省长春市二道区第五十二中学2023-2024学年九年级上学期期中数学试题新疆维吾尔自治区阿克苏地区2023-2024学年九年级下学期3月期末数学试题
7 . 如图,某劳动小组借助一个直角墙角围成一个矩形劳动基地
,墙角两边
和
足够长,用总长
的篱笆围成另外两边
和
.有下列结论:
的长是
时,劳动基地
的面积是
;
②
的长有两个不同的值满足劳动基地
的面积为
;
③点
处有一棵树(树的粗细忽略不计),它到墙
的距离是
,到墙
的距离是
,如果这棵树需在劳动基地内部(包括边界),那么劳动基地面积的最大值是
,最小值是
.
其中,正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf2fc57da7f8399eae9ad9ad22ca836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167e6e41ac221847824a72e964f340f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6307c0249ba768c1c0c9a253c31720d2.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb92c9032804326713c7b4feea53f40.png)
③点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e978c77cb0d7eff794447241e9829867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ea92883fe24b097c9a881ef8c92eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a796b826cc01a89d10f83be5e29d7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4fb5474bdc74da700b463eabd05bd8e.png)
其中,正确结论的个数是( )
A.0 | B.1 | C.2 | D.3 |
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8 . 如图,抛物线
与x轴交于
,
两点,与y轴交于点C;点P是第四象限抛物线上一点,过点P作
轴,交x轴与点D,交BC与点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/98914058-6fa6-4f6f-b69d-9a21d6eff181.png?resizew=372)
(1)求抛物线的解析式;
(2)过点P作
交
于点F,求
的最大值及此时点E的坐标;
(3)如图②,点Q是线段OC上一点,且
,连接QB,OF,点P在运动过程中,是否存在
的值最小,若存在.请直接写出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c468dc5cc34c14a188493a21019e8f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f00d0ff8dd38da17167cf9b789eec0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/98914058-6fa6-4f6f-b69d-9a21d6eff181.png?resizew=372)
(1)求抛物线的解析式;
(2)过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7edadd9995393ece0d7b7bf4801504bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)如图②,点Q是线段OC上一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea7149d3682df6f68a3f749b66aaba90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e489115defb22258276857fe32274b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e489115defb22258276857fe32274b.png)
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2卷引用:天津市南开翔宇学校2023-2024学年中考一模数学试题
9 . 在平面直角坐标系中,点
,
,
),C,D分别为
,
的中点.以点O为中心,逆时针旋转
得
点C,D的对应点分别为点
,
.
落在y轴上时,点
的坐标为_____,点
的坐标为______;
(2)如图②,当点
落在
上时, 求点
的坐标和
的长;
(3)若M为
的中点,求
的最大值和最小值(直接写出结果即可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685d31faa9b3bc099e4c5a11b80088f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0d1e4a02f6a99a4b838dcaf9541d7f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7272800367fac5ade01f94e7a5c3ef5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8d4c698f29985f639e496c12155f4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcb14ac7dc9cd7c8b11276bbf5c5f687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
(2)如图②,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b435d7fc33860ae191f9111d880b40.png)
(3)若M为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d42170c7d4249f6b390823606c18c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
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10 . 如图,二次函数
图象交坐标轴于点
,
.点
为线段
上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/da17ed50-4fcf-4526-8496-e666f661de57.png?resizew=182)
(1)求二次函数的解析式及顶点坐标;
(2)过点
作
轴分别交线段
、抛物线于点
和点
,求线段
的最大值及此时
的面积;
(3)当
取最小值时,求此时点
的坐标及:
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298b7ec6eac30c0545bcadd7cc9755d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6bbbb53aaeab0ab7a242228cc510fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1bf75102d42949ac25e0b87c9ec2db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/da17ed50-4fcf-4526-8496-e666f661de57.png?resizew=182)
(1)求二次函数的解析式及顶点坐标;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a94436893a74f5a3a731256c8773ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3730e2fa70360e60286cff11b37c3051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d740d0912f20a8b5281f82b0335a2de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d740d0912f20a8b5281f82b0335a2de.png)
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2卷引用:天津市和平区2023-2024学年九年级上学期期末数学试题