如图,抛物线
的顶点为
,对称轴为直线
,且经过点
,与
轴交于点
.
(1)求抛物线的解析式;
(2)连结
、
,求
的面积;
(3)点
是抛物线对称轴上一点,若
为等腰三角形,请直接写出所有点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6300e1ebe1e6b8ee9743e2da16f02f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求抛物线的解析式;
(2)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147de24f071e316b68fd2e78e3c84545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2020/3/29/2436557399900160/2438081888813056/STEM/8fae41d2-0d77-4ce3-bcc4-994f790eda4d.png)
更新时间:2020-04-10 01:13:12
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解答题-问答题
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【推荐1】如图,在平面直角坐标系中,抛物线
与
轴交于点
,
,与直线
交于
轴上的点
,直线
与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/448edeca-2aba-4367-a00f-e28514a56822.png?resizew=160)
(1)求该抛物线的解析式;
(2)点
是抛物线上第一象限内的一个动点,连接
、
,当
的面积最大时,求点
的坐标;
(3)将抛物线的对称轴向左平移
个长度单位得到直线
,点
是直线
上一点,连接
、
,若直线
上存在使
最大的点
,请直接写出满足条件的点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8ebddfbde09a8bbeef7b4437976c702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ffb694021b52653de5141ae27ba6d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb78f3171d62c881e87daf007c71cba3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8d0b5e8ea03eee9dc72694b4736b12c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eb1197ba85199306adaac2bf68a594b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fcf9bfbf771cb6118f8e631724314e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6085ef9c05a4dffd321cb8ba12ba6f85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ffb694021b52653de5141ae27ba6d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289d7a880379d6060065c829b45b0ed6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/448edeca-2aba-4367-a00f-e28514a56822.png?resizew=160)
(1)求该抛物线的解析式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5c19ac440746be97d8b46af5d288a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8f99467f791344ee3306c3ee95ced0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5c19ac440746be97d8b46af5d288a.png)
(3)将抛物线的对称轴向左平移
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25b2bbf7e0d8ad8306348d9057671f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a159de0b2d9eb1ae0b7e664e64d3c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a159de0b2d9eb1ae0b7e664e64d3c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a159de0b2d9eb1ae0b7e664e64d3c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/853c42ad801b5ff0af8e6bfff3ee5819.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
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【推荐2】如图,已知点
在二次函数
的图象上,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1559999ae4aadad863d5c79efb88bc7.png)
(1)若该二次函数的图象经过点
,求这个二次函数的表达式;
(2)若
,求
时二次函数的最大值与最小值的差;
(3)当
时,
的最小值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d7d5b7a335fb30a034976287aee9e05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d6073e2a222920e950faa7cbe9afd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1559999ae4aadad863d5c79efb88bc7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/22/c7785160-74dc-4f77-8287-19803c8a79fe.png?resizew=191)
(1)若该二次函数的图象经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd11e877493a305ed582b3cb7d0576db.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1292c47f62023b747f1a4bd615c75284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bb6e968e36cb69ce809d4f27d57fdda.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966d9dd819cba29980da3700422c2497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解答题-问答题
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名校
【推荐1】已知:
,
是方程
的两个实数根,且
,抛物线
的图象经过点
.
(1)求这个抛物线的解析式;
(2)设(1)中的抛物线与
轴的另一交点为C,抛物线的顶点为D,试求
的面积;
(3)
是线段
上的一点,过点
作
轴,与抛物线交于
点,若直线
把
分成面积之比为
的两部分,请求出
点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e20a1bffcffb243c0e28d82c3e9768b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7961cbe98aac6a5fdee94582c341b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf407097fe72b97be6725f9b5821184a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/25/c0a42e6a-76c2-4bab-a78f-d62754f078d3.png?resizew=145)
(1)求这个抛物线的解析式;
(2)设(1)中的抛物线与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59fbd9b5e5d8be69373850d7faebdaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d303a90093503c9dc6f12669cc9f842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4806fb7f95f63e863c287faa51f8e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】如图,抛物线y=ax2﹣2ax+c的图象经过点C(0,﹣2),与x轴交于A(﹣1,0)、B两点.
(1)求抛物线的解析式及点B的坐标;
(2)若P为线段BC下方抛物线上的一动点,设△PBC的面积为S,求S的最大值.
(1)求抛物线的解析式及点B的坐标;
(2)若P为线段BC下方抛物线上的一动点,设△PBC的面积为S,求S的最大值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/a5109dba-1a73-4f1b-8559-6861d2f7c860.png?resizew=239)
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