如图,在平面直角坐标系中,二次函数
的图象的顶点为点D,与y轴交于点C,与x轴交于
,
两点.
(2)若点P是x轴上一动点,当
的周长最小时,求点P的坐标;
(3)如图,若点
是该抛物线上一点,E是直线
下方抛物线上的一动点,点E到直线
的距离为d,求d的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5bd57912b194186fb5cbe63ed24861.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/158f5a581695399f6ffdf65110dec692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf982e2547498e78cd6b95f5bcaaa62.png)
(2)若点P是x轴上一动点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
(3)如图,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b73294cad91a6531dad88edacebb6a23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
更新时间:2024-05-11 20:58:08
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】已知抛物线
的最低点的纵坐标为
,它与x轴交于点A和B(点A在原点左侧点B在原点右侧),与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/866aca2e-2fe5-4a5d-963a-6640b07961d7.png?resizew=220)
(1)求抛物线的解析式;
(2)如图1,点D是抛物线的一点,与点C关于抛物线对称轴对称,点
,n为任意实数,当n变化时,点P在直线l上运动,若点A,D到直线l的距离相等,求k的值;
(3)将该抛物线在
间的部分记为图象G,将图象G在直线
下方的部分沿
翻折,其余部分保持不变,得到一个新的函数的图象,记这个函数的最大值为m,最小值为n,若
.求t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08925d5738b4b5e5e4054bc3d2ed3081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/866aca2e-2fe5-4a5d-963a-6640b07961d7.png?resizew=220)
(1)求抛物线的解析式;
(2)如图1,点D是抛物线的一点,与点C关于抛物线对称轴对称,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d973582fd9058344b639564ea67d139c.png)
(3)将该抛物线在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53168695826b0a33a23067b76173c7e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ff39dd1dfc9caf911ad0d11ba21d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ff39dd1dfc9caf911ad0d11ba21d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb458c3d3610fb90042e37fb809061c.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,在平面直角坐标系中,二次函数
的图象与y轴交于点C,与x轴交于点A、B,点A的坐标为
,点B的坐标为
,且
.
![](https://img.xkw.com/dksih/QBM/2020/12/19/2624563439960064/2630461656186880/STEM/7075fce2-fecb-43a4-960e-222543102712.png)
(1)求这个二次函数的表达式;
(2)若点
是该抛物线上一点,求直线AG的表达式;
(3)点P是直线AG下方的抛物线上的一动点,当点P运动到什么位置时,
的面积最大?求此时点P的坐标和
的最大面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3a2f5b0702ea9fbb9dc8904579737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c8dbc31b2e14067ef2f34b4e25f114.png)
![](https://img.xkw.com/dksih/QBM/2020/12/19/2624563439960064/2630461656186880/STEM/7075fce2-fecb-43a4-960e-222543102712.png)
(1)求这个二次函数的表达式;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434a23ffd376979e1791f21a47542a89.png)
(3)点P是直线AG下方的抛物线上的一动点,当点P运动到什么位置时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be582acf9b642aab783bfc29c595e88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be582acf9b642aab783bfc29c595e88.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图1,在平面直角坐标系
中,二次函数
的图象与
轴的交点坐标为
,图象的顶点为
.矩形
的顶点
与原点
重合,顶点
分别在
轴,
轴上,顶点
的坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/be6a12b1-e1f8-4238-98f1-101a0a3bfff0.png?resizew=407)
(1)
,顶点
的坐标为 ;
(2)如图2,将矩形
沿
轴正方向平移
个单位
得到对应的矩形
.已知边
,
分别与函数
的图象交于点
,连接
,过点
作
于点
.
①当
时,求
的长;
②当点
与点
重合时,点
的坐标为 ,点
的坐标为 ;
③当点
与点
不重合时,是否存在这样的
,使得
的面积为1?若存在,求出此时t的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a02bdd28c0e0b73d3316aec5d9a7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccff872751ed202fdf39cbaa440ed181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/7b00c9499415c5801c64a8177f4b35e6.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85054e396c22664b48479ffde8b025e1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/be6a12b1-e1f8-4238-98f1-101a0a3bfff0.png?resizew=407)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)如图2,将矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66cee2447cc1b27fb88084268f4496c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d609847e2ff3d64e5a514582c3ead0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d42170c7d4249f6b390823606c18c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a02bdd28c0e0b73d3316aec5d9a7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ad58997b9dc0b341c9af08f0cd1fbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8283d254eba124ee1f1af960bc1686c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55bb0405afa96ebf94c5b03fd52763dd.png)
②当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
③当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e287887b05e5a3a59a7b7bf1a64f9a.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图1,在平面直角坐标系
中,已知抛物线
与x轴交于A,B两点,与y轴交于点C,且A点坐标为
,抛物线的对称轴为直线
,连接直线BC.
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958758976405504/2978061315219456/STEM/3978afca-138b-4f62-b3a5-8904f8d6ce4a.png?resizew=462)
(1)求抛物线的解析式;
(2)若点D为第一象限内抛物线上一动点,连接AD,交直线BC于点E,连接BD,如图2所示,记△BDE的面积为
,△ABE的面积为
,求
的最大值.
(3)若点M为对称轴上一点,N为平面内一点,是否存在以M,N,B,C为顶点的四边形为矩形,若存在,直接写出满足条件的M点坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a13a05817286a6b828b07753fb75f45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72480c8fae3dc057229a7958e9daed74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958758976405504/2978061315219456/STEM/3978afca-138b-4f62-b3a5-8904f8d6ce4a.png?resizew=462)
(1)求抛物线的解析式;
(2)若点D为第一象限内抛物线上一动点,连接AD,交直线BC于点E,连接BD,如图2所示,记△BDE的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
(3)若点M为对称轴上一点,N为平面内一点,是否存在以M,N,B,C为顶点的四边形为矩形,若存在,直接写出满足条件的M点坐标;若不存在,请说明理由.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐1】如图,在平面直角坐标系
中,直线
与反比例函数
的图象交于
,B两点.
(2)过A作直线
的垂线l,点C为l上且在第四象限内的点,当满足
时,求此时点C的坐标;
(3)在(2)的基础上,点P为C右侧且在反比例函数上一点,连接
,过点P作
交x轴于点N,连接
,M为线段
上一点,且
,连接
,是否存在一点P,使得
与
相似,若存在,求出P点坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16a86b241c184854b28d80f5b667295f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/885b9c59dd68898a70be0bbad5fa4f07.png)
(2)过A作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16a86b241c184854b28d80f5b667295f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61556c56e8b16fe2e80dbc858ed575bc.png)
(3)在(2)的基础上,点P为C右侧且在反比例函数上一点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae2cf9038a2d554e34c794d38b892332.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dafebaaf13781120dc57c277d0267c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0f85d264010dfa779e695a38d5e353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b64c964c75ff785557c7c9b86d205d48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e8ecb371ce77dca5554e8e03b41386.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐2】如图,在
中,
,
,
,
是
边上的中点.过点
作
的垂线
,过点
作
的平行线,交
于点
,点
从点
到点
沿
方向匀速运动,速度为2cm/s,同时点
从点
到点
沿
方向匀速运动,速度为1cm/s.连接
,过点
作
于点
,连接
.设运动时间为
(s)(
),解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/85af3a7c-43b2-42bd-97de-3f290b4b49fd.png?resizew=328)
(1)当
为何值时,四边形
为平行四边形?
(2)当
为何值时,点
在
的平分线上?
(3)当
为何值时,四边形
的面积为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee49e97546d466ba3ee630e08cdc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545764505bb00578a870c5e39493a3e.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.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/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e48ec323eb922d8f95970689e411021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632917e61f4208959686d118c7f19231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b696fa8fd1e374d3c615c81047db4bad.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/85af3a7c-43b2-42bd-97de-3f290b4b49fd.png?resizew=328)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3de04c9d98ff086f2958591ab4beaced.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e68d0260fb6cf6ffb9a63ab54f312012.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5898ec9645a2f4e02efb60992dcb621.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】已知抛物线
与
轴有两个交点
,且与
轴交于点
.
(1)求该抛物线的解析式;
(2)点
分别是该抛物线上对称轴两侧的点.
①若
,且
,当
时,试判断
的正负性,并说明理由;
②当
经过原点
时,取
的中点
,分别过点
作
轴的垂线
交直线
于点
,连接
相交于点
,求证:
轴.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4509d47801aa0dac3746fa65814dacf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7fee113c90f277e74a204fdcbf89bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)求该抛物线的解析式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ec422317d241e7d38fc92fd5633be2.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665854d07d9cbc96d98b2e393a05aee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f463d15ea07e956304598850bc30cc87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4077d5b51cc3c00e7d2b8038035dc1.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/fbdb21011ea821b91d539cb763aac649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f95fd176854673d22eb930f45103d76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d0aa9412dd7caf42cc71520e282328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2923e83121c83daecf2e91bd9ac779aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ba0a985299593b0b55b0f8328a8d1a6.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐2】在平面直角坐标系
中,抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42ba2cf074d237d460fde82f3f96659.png)
与y轴交于点A.
(1)求点A的坐标及抛物线的对称轴;
(2)当
时,y的最小值是-2,求当
时,y的最大值;
(3)抛物线上的两点 P(
,
),Q(
,
),若对于
,
,都有
,直接写出t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42ba2cf074d237d460fde82f3f96659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf8197e4f3fd18815045d29c357a863.png)
(1)求点A的坐标及抛物线的对称轴;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be48cd4158fb76190935ab143de02ba3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be48cd4158fb76190935ab143de02ba3.png)
(3)抛物线上的两点 P(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02eaa35abd17f216693fd9a9929f151.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caed13e0fe368f51bcf2e59cebe52970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6f3a6c1002546a7568c91ad97e47d8.png)
您最近一年使用:0次