已知,在以O为原点的直角坐标系中,抛物线的顶点为A (﹣1,﹣4),且经过点B(﹣2,﹣3),与x轴分别交于C、D两点.
(2)如图1,点M是抛物线上的一个动点,且在直线OB的下方,过点M作x轴的平行线与直线OB交于点N,求MN的最大值;
(3)如图2,过点A的直线交x轴于点E,且AE∥y轴,点P是抛物线上A、D之间的一个动点,直线PC、PD与AE分别交于F、G两点.当点P运动时,EF+EG是否为定值?若是,试求出该定值;若不是,请说明理由.
(2)如图1,点M是抛物线上的一个动点,且在直线OB的下方,过点M作x轴的平行线与直线OB交于点N,求MN的最大值;
(3)如图2,过点A的直线交x轴于点E,且AE∥y轴,点P是抛物线上A、D之间的一个动点,直线PC、PD与AE分别交于F、G两点.当点P运动时,EF+EG是否为定值?若是,试求出该定值;若不是,请说明理由.
16-17九年级上·江苏泰州·期末 查看更多[10]
2017届江苏泰州兴化市顾庄学区三校九年级上期末数学试卷2018年湖北省黄石市大冶市中考数学模拟试卷【市级联考】山东省潍坊诸城市2019届九年级下学期中考一模数学试题2019年山东省潍坊市临朐县中考数学一模试题湖北省黄石市鹏程中学2019-2020学年九年级下学期期中数学试题(已下线)专题10 二次函数与线段最值定值及数量关系问题-挑战2022年中考数学压轴题之学霸秘笈大揭秘山东省德州市德城区第五中学2020-2021学年九年级下学期第一次月考数学试题(已下线)2023年四川省成都市中考数学真题变式题24-26题2023年山东省聊城市初中学生学业水平考试数学模拟预测题(一)2024年内蒙古赤峰市喀喇沁旗九年级中考数学一诊模拟试题
更新时间:2022-03-01 18:32:28
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相似题推荐
解答题-问答题
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【推荐1】如图,已知二次函数的图象经过点
、
和原点
.
为二次函数图象上的一个动点,过点
作
轴的垂线,垂足为
,并与直线
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/9a689a64-3007-4fdc-809a-2b776966e69d.png?resizew=322)
(1)求直线
和二次函数的解析式;
(2)当点
在直线
的上方时,
①当
的长最大时,求点
的坐标;
②当
时,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c53c2ce5532642de107e0d85c75f3e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/349109e1d324c60a977c98bc30ec9973.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/9a689a64-3007-4fdc-809a-2b776966e69d.png?resizew=322)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/444aa07c53756a3dcbc8e0374f5778da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】抛物线
与
轴交于点
,与
轴交于点
、B,
平行于
轴交抛物线于另一点
,点
是
轴上一动点,连接
,过点
作
交
于点
(点
在线段
上,不与点
重合),
的式子表示).
(2)若点
的坐标为
,则线段
存在唯一一点
,
①求抛物线的解析式
②如图2,连接
,点
为直线
上方抛物线上的动点,过点
作
于点
,连接
,是否存在点
使
中某个角恰好等于
的2倍?若存在,请求出点
的横坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fd688cd1982a4219d267593534929c.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f1ec507a8f1458a5a45b90909437f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac00a74d743009b5fa58522726fd79fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
①求抛物线的解析式
②如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902f24325565a9dd95128a633a240da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba70863115b0947e98214a7b2512167d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】如图1,抛物线
与x轴交于
,B两点,与y轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/a89870e9-e6a4-4216-a0a9-c6c2310da069.png?resizew=346)
(1)求抛物线的解析式;
(2)若点D是第一象限内抛物线上的一点,
与
交于点E,且
,求点D的坐标;
(3)如图2,已知点
,抛物线上是否存在点P,使锐角
满足
?若存在,求出点P的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930b7d97d063ae7928fc5b64b8724b01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3062f849b63c50d8f7a09d66b019c33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f57ecabf8b11f5c0bdbe50a34eb7a8e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/a89870e9-e6a4-4216-a0a9-c6c2310da069.png?resizew=346)
(1)求抛物线的解析式;
(2)若点D是第一象限内抛物线上的一点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f849faf3d202bcb0b1c7cb7808b6ee.png)
(3)如图2,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda6c941354901638cf21ca1e4083f5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28a4c16131c5743e058f02a2522f1cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a49ef02be8256e4ce950ea2263372f2e.png)
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【推荐2】如图,在
中,
,
平分
交
于点
,
为
上一点,经过点
,
的圆
分别交
,
于点
,
,连接
.
(1)求证:
是圆
的切线;
(2)求证:
;
(3)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/8/0316b630-14da-4051-ad40-1fc5cf3f79c5.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/340febcabc885e78ff4fc4b2b75085de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2c4801cb3235f5798fda6b56e4e9d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc560914a24fb80a6608da7a188f8724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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【推荐3】学习了相似三角形知识后,小丽同学准备用自制的直角三角形纸板测量校园内一颗古树的高度.已知三角形纸板的斜边长为0.5米,较短的直角边长为0.3米.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/9bb70d44-b021-450b-8d93-02ef1ba1eba4.png?resizew=575)
(1)小丽先调整自己的位置至点
,将直角三角形纸板的三个顶点位置记为
、
、
(如图①),斜边
平行于地面
(点
、
、
、
在一直线上),且点
在边
(较长直角边)的延长线上,此时测得边
距离地面的高度
为1.5米,小丽与古树的距离
为16米,求古树的高度
;
(2)为了尝试不同的思路,小丽又向前移动自己的位置至点
,将直角三角形纸板的三个顶点的新位置记为
、
、
(如图②),使直角边
(较短直角边)平行于地面
(点
、
、
、
在一直线上),点
在斜边
的延长线上,且测得此时边
距离地面的高度依然是1.5米,那么小丽向前移动了多少米?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/9bb70d44-b021-450b-8d93-02ef1ba1eba4.png?resizew=575)
(1)小丽先调整自己的位置至点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)为了尝试不同的思路,小丽又向前移动自己的位置至点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e737bc35da650eda3825d29799b5f86f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c69596e1040b4b35b7c1e05e2533cc99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e737bc35da650eda3825d29799b5f86f.png)
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【推荐1】如图,抛物线
与
轴相交于
两点,其中点
的坐标为
点坐标为
,且点
在抛物线
上.
(1)求抛物线的解析式;
(2)点
为抛物线与
轴的交点;
①点
在抛物线上,且
,求点
坐标;
②设点
是线段
上的动点,作
轴交拋物线于点
,求线段
长度的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f479350a0cb34cf4f399d636509e8a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663d94efcc8a8a4b5a3563e94eb8fbb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/5c02474a-9d60-4237-b9d5-8657bf4f5bd8.png?resizew=145)
(1)求抛物线的解析式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e6544f044d98d287a7f0d2c6eef209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
②设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52cbeb9b1c1d637b903cf3e5c7f730f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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较难
(0.4)
【推荐2】如图,平面直角坐标系中,二次函数
图像交x轴于点A、B,交y轴于点C,图像对称轴交x轴于点D.点P是线段OD上一动点,从O向D运动,H是射线BC上一点.
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987806642839552/2990797813923840/STEM/652dd16d-b0cc-4a2f-967a-61699f0f0259.png?resizew=285)
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987806642839552/2990797813923840/STEM/9e7653b3-f25f-4a35-9cfb-7bb04382b5a2.png?resizew=281)
(1)则点A的坐标为 ,点B的坐标为 ,线段BC的长为 ;
(2)如图1,在P点运动过程中,若△OPC中有一个内角等于∠HCA,求OP的长;
(3)如图2,点
在二次函数图像上,在P点开始运动的同时,点Q在抛物线对称轴上从D点向上运动,Q点运动速度是P点运动速度的2倍,连接QM,则
的最小值为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2db321273124fbbf815d297daa84167.png)
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987806642839552/2990797813923840/STEM/652dd16d-b0cc-4a2f-967a-61699f0f0259.png?resizew=285)
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987806642839552/2990797813923840/STEM/9e7653b3-f25f-4a35-9cfb-7bb04382b5a2.png?resizew=281)
(1)则点A的坐标为 ,点B的坐标为 ,线段BC的长为 ;
(2)如图1,在P点运动过程中,若△OPC中有一个内角等于∠HCA,求OP的长;
(3)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bea32e3196bf2b8e1edfb2715e604ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c9296ca20727e94b0ce976494f25451.png)
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【推荐1】如图,对称轴为直线
的抛物线
图象与
轴交于点
、
点
在点
的左侧
,与
轴交于点
,其中点
的坐标为
,点
的坐标为
.
(2)如图
,若点
为抛物线上第二象限内的一个动点,点
为线段
上一动点,当
的面积最大时,求
周长的最小值;
(3)如图
,将原抛物线绕点
旋转
,得新抛物线
,在新抛物线
的对称轴上是否存在点
使得
为等腰三角形?若存在,请直接写出点
的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c190d7be61c1f414b1c5b7cbfaefef37.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/3a920a78c48e71749017d40e01caa3a3.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/04582116cd765fcc5a52f44279ad6c94.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c0573e2af8a0dc8c6a1c0af067a324f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b46a4c1c8cbd47e1e906f60151c2eeb.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/bdc93e193fad261689949a52819753f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/784b26de6134b6d3f5a81e2882a7d7f8.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a1eda00fc2d64ce3a42004b24adf00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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解答题-证明题
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较难
(0.4)
【推荐2】若三个非零实数
,
,
满足:只要其中一个数的倒数等于另外两个数的倒数的和,则称这三个实数
,
,
构成“和谐三组数”.
(1)实数
,
,
可以构成“和谐三组数”吗?请说明理由;
(2)若直线
与
轴交于点
,与抛物线
交于
,
两点.
①求证:
,
,
三点的横坐标
,
,
构成“和谐三组数”;
②若
,
,求点
与原点
的距离
的取值范围.
![](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/e81e59019989b7dc2fb59b037ef6e010.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/e81e59019989b7dc2fb59b037ef6e010.png)
(1)实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/582734ed7d5fc6eda6a1b3dc0c25d5cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ec3d75e53b990bc8f9a4622928dd21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ca2408270ef40d34e133ea824641912.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c16dac1e9bf5804c8907cbc59014d04.png)
①求证:
![](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/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a07c1e09c4131dba545a176c454386b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eba583e37243f3ba166bd1c11e58498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fd82e81c8ca427f6453ae12e866e665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
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