抛物线
与
轴交于
、
两点,与
轴交于点
,点
的坐标为
,点
的坐标为
.点
为抛物线
上的一个动点.过点
作
轴于点
,交直线
于点
.
(1)求
、
的值;
(2)设点
在抛物线
的对称轴上,当
的周长最小时,直接写出点
的坐标;
(3)在第一象限,是否存在点
,使点
到直线
的距离是点
到直线
的距离的5倍?若存在,求出点
所有的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/d053b14c8588eee2acbbe44fc37a6886.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/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec40ff4479edca2ed18b6cadb8db72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f00d0ff8dd38da17167cf9b789eec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fb6e81fee5674c3e26a65e58cc506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(3)在第一象限,是否存在点
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
2020·云南·中考真题 查看更多[13]
云南省2020年中考数学试题2020年河南省普通高中招生考试数学试卷(备用卷)山东省济宁市任城区2020-2021学年九年级上学期期中数学试题(已下线)练习11分式方程-2020-2021学年【补习教材·寒假作业】九年级数学江苏省无锡市江阴市2020-2021学年九年级下学期期中数学试题2021年山东省济宁市鱼台县一模数学试题2021年山东省济宁市汶上县中考数学一模试卷(已下线)【万唯原创】2021年广东试题研究-练册-第三章5(已下线)【万唯原创】2021年河南省面对面-练习册-第三章 函 数7~9(已下线)【万唯原创】2021年山西专项集训-解答题专项-第一部分题型9类型6(已下线)【万唯原创】2021年陕西省试题研究-讲册-第二部分 基础解答题型十三 1云南省文山壮族苗族自治州砚山县2021-2022学年九年级上学期期末数学试题(已下线)中考解答86题真题考点统计分析2
更新时间:2020-07-27 15:51:02
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】综合与实践.
【问题发现】
(1)如图1,在正方形
中,E为对角线
上的动点,过点B作
的垂线,过点C作
的垂线,两条垂线交于点F,连接
,求证:
,
【类比探究】
(2)如图2,在矩形
中,E为对角线
上的动点,过点B作
的垂线,过点C作
的垂线,两条垂线交于点F,且
,连接
,求
的值.
【拓展延伸】
(3)如图3,在(2)的条件下,将E改为直线
上的动点,其余条件不变,取线段
的中点M,连接
,
,若
,则当
是直角三角形时,请求出
的长.
【问题发现】
(1)如图1,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d96a5d40d0aea9f4398ca4d0fe9b0dd.png)
【类比探究】
(2)如图2,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a12235fc709caecafb64248d2fb8001.png)
【拓展延伸】
(3)如图3,在(2)的条件下,将E改为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8045b729b7f257861057191a8a2388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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解答题-问答题
|
较难
(0.4)
【推荐2】如图1,直线
与x轴交于点B,与y轴交于点C,抛物线
经过B、C两点,且与x轴交于另一点A.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/c93b6048-0223-46ac-8b18-97b715ff86a0.png?resizew=480)
(1)求抛物线的解析式;
(2)如图2,点E的坐标为
,经过点A的直线
与该抛物线交于点F,点P是直线
上的一个动点,连接
、
、
,记
的面积为
,
的面积为
,那么
的值是否是定值?如果是,请求出这个定值;如果不是,请说明理由.
(3)如图3,点Q是直线
上方的抛物线上的动点(不与点B、C重合),过Q作
轴交
于点G,作
于点H,求
的周长的最大值.
(4)当(3)中
的周长取得最大值时,将
绕着点G旋转一周,在旋转的过程中,点Q、G、H的对应点分别记为
、
、
.当点
恰好落在坐标轴上时,请直接写出相应的点
坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9118cc77fc0a045337745890e50cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/c93b6048-0223-46ac-8b18-97b715ff86a0.png?resizew=480)
(1)求抛物线的解析式;
(2)如图2,点E的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d52ebc35b17eb8372d8029131ab286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc0b7ecccdda6623f2a49e6e05cd7c4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe40405cd7bd60d69dd535d6da85c00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
(3)如图3,点Q是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3980d14ab4357db3fab871ad362ac6b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4bbf76c3338d4da45034fa715bfeaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d77f7eb0e0268c011c351672ef7133.png)
(4)当(3)中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d77f7eb0e0268c011c351672ef7133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d77f7eb0e0268c011c351672ef7133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42da28be159399514cc6179a96e34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81722445de00f3cfcc3cb97e45b0d8dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d955d197e2ecbfe724570663efcf2a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42da28be159399514cc6179a96e34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d955d197e2ecbfe724570663efcf2a2d.png)
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解答题-问答题
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较难
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【推荐1】如图,在平面直角坐标系中,抛物线y=﹣x2+
与y轴相交于点A,点B与点O关于点A对称.
![](https://img.xkw.com/dksih/QBM/2018/11/19/2079138493145088/2080304251076608/STEM/0e82ad586f5b49cda3c388cae841e2ee.png?resizew=130)
(1)填空:点B的坐标为________;
(2)过点B的直线y=kx+b(其中k<0)与x轴相交于点C,过点C作直线l平行于y轴,P是直线l上一点,且PB=PC,求线段PB的长(用含k的式子表示),并判断点P是否在抛物线上,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://img.xkw.com/dksih/QBM/2018/11/19/2079138493145088/2080304251076608/STEM/0e82ad586f5b49cda3c388cae841e2ee.png?resizew=130)
(1)填空:点B的坐标为________;
(2)过点B的直线y=kx+b(其中k<0)与x轴相交于点C,过点C作直线l平行于y轴,P是直线l上一点,且PB=PC,求线段PB的长(用含k的式子表示),并判断点P是否在抛物线上,说明理由.
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名校
【推荐2】如图1,抛物线
(
)与
轴交于点
,与
轴交于点
,在线段
上有一动点
(不与
,
重合),过点
作
轴的垂线交直线
于点
,交抛物线于点
.
(1)分别求出抛物线和直线
的函数表达式;
(2)连接
、
,求
面积的最大值,并求出此时点
的坐标;
(3)如图2,点
,将线段
绕点
逆时针旋转得到
,旋转角为
(
),连接
,
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4507909b38b8c78b81deefb7478a75da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baedc4d7e690ab3f7d80d30ba0a9efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27149c9ff20937492950f42084caa019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)分别求出抛物线和直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea5b6926cdb99eb58070b8720718f71a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec1093f2bd72971a21411d53d4fabb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708d48b595c17d4dccf9b4086d7e664e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66f222bf4ccd07b01fb839de95a10b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae9d86cfd84294ba79521676570e2d34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3224a8b82699f7f61cac44b68a35f043.png)
![](https://img.xkw.com/dksih/QBM/2021/3/3/2670113589010432/2675051211735040/STEM/b33a9c3f-dd60-43b7-a5a4-a52304fc0403.png)
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