如图,二次函数
的图像与x轴交于点A(
2,0)和点B(4,0),与y轴交于点E,以AB为边在x轴下方作正方形ABCD,点M是x轴上一动点,连接CM,过点M作MN⊥MC,与AD边交于点N,与y轴交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/511b1399-11ac-4c81-8387-52c00cab34ec.png?resizew=207)
(1)求该抛物线的表达式;
(2)在第一象限的抛物线上任取一点P,连接EP、PB,请问:△EPB的面积是否存在最大值?若存在,求出此时点P的坐标;若不存在,请说明理由;
(3)当点M在线段OB(点M不与O、B重合)上运动至何处时,线段OF的长有最大值?并求出这个最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/511b1399-11ac-4c81-8387-52c00cab34ec.png?resizew=207)
(1)求该抛物线的表达式;
(2)在第一象限的抛物线上任取一点P,连接EP、PB,请问:△EPB的面积是否存在最大值?若存在,求出此时点P的坐标;若不存在,请说明理由;
(3)当点M在线段OB(点M不与O、B重合)上运动至何处时,线段OF的长有最大值?并求出这个最大值.
更新时间:2022-06-22 18:31:10
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【推荐1】如图,已知过坐标原点的抛物线经过
,
,
,
两点,且
、
是方程
两根
,抛物线顶点为
.
![](https://img.xkw.com/dksih/QBM/2023/1/12/3151091420119040/3151373142605824/STEM/78efe558a36e4cadbb95384268d82b46.png?resizew=182)
(1)求抛物线的解析式;
(2)若点
在抛物线上,点
在抛物线的对称轴上,且以
、
、
、
为顶点的四边形是平行四边形,求点
的坐标;
(3)
是抛物线上的动点,过点
作
轴,垂足为
,是否存在点
使得以点
、
、
为顶点的三角形与
相似?若存在,求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a54e0b4872cabdc0b07ea9380e4de5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fb378d6bf91902efa15881985c5e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b8e72f73db207c3040f143d837d5995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2324a65e345753fdd1db2354bfb0ee4.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/e56e774c48d99c7834d4a02d855a5e95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5db677a20beca73bb83e324539ba8bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2023/1/12/3151091420119040/3151373142605824/STEM/78efe558a36e4cadbb95384268d82b46.png?resizew=182)
(1)求抛物线的解析式;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)
![](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/ea3a3db6d96518255f96ad7fc1ac98f4.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7ffcd1925a2b1259221c6a476152f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】如图,抛物线
与
轴相交于点
,与
轴交于点
,点
是第二象限内抛物线上一动点,点
是
轴上一动点.
(1)求这条抛物线的解析式;
![](https://img.xkw.com/dksih/QBM/2021/2/1/2648778301251584/2650275766951936/STEM/d25e3c3e-c59a-43ed-8687-97cd88758454.png)
(2)当
取最大值时,判断点
是否为抛物线顶点;
(3)若点
为抛物线顶点,连接
,把线段
绕点
旋转
,使得旋转后的线段
与线段
有交点,请求出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3af02baf8698283da1642be10139742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca9d80b2cb1693b354c149e426d9c3ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6eef66f2b839fa393e7c0216676edd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求这条抛物线的解析式;
![](https://img.xkw.com/dksih/QBM/2021/2/1/2648778301251584/2650275766951936/STEM/d25e3c3e-c59a-43ed-8687-97cd88758454.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18ffad5759b1196209330cce7e51755a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0468237bbc0d3df77435d98b817c10c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://img.xkw.com/dksih/QBM/2021/2/1/2648778301251584/2650275766951936/STEM/4757435f-f50d-4f02-bd57-d59e10a21b9c.png)
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【推荐3】如图,在平面直角坐标系中,抛物线
与x轴交于B,C两点(C在B的左侧),与y轴交于点A,已知
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898551214743552/2899868771147776/STEM/38e84a0f-7866-42ea-93f2-9132c7f7cd1a.png?resizew=223)
(1)求抛物线的表达式;
(2)若点Q是线段AC下方抛物线上一点,过点Q作QD垂直AC交AC于点D,求DQ的最大值及此时点Q的坐标;
(3)点E是线段AB上一点,且
;将抛物线
沿射线AB的方向平移,当抛物线恰好经过点E时,停止运动,已知点M是平移后抛物线对称轴上的动点,N是平面直角坐标系中一点,直接写出所有使得以点A,B,M,N为顶点的四边形是菱形的点N的坐标,并把求其中一个点N的坐标的过程写出来.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c468dc5cc34c14a188493a21019e8f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c87b7e39ab4c173e357d92f345ddab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abef063e1692494fd4769d100f044b8.png)
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898551214743552/2899868771147776/STEM/38e84a0f-7866-42ea-93f2-9132c7f7cd1a.png?resizew=223)
(1)求抛物线的表达式;
(2)若点Q是线段AC下方抛物线上一点,过点Q作QD垂直AC交AC于点D,求DQ的最大值及此时点Q的坐标;
(3)点E是线段AB上一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b93c4c602bc6005fe716a7a4f3eda805.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c468dc5cc34c14a188493a21019e8f83.png)
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【推荐1】(1)如图1,在
与
中,
,
,连结
,
,求
和
的数量关系;
(2)如图2,在
与
中,
,
,边
和
交于点F.点D在边
上,
,求
;
(3)如图3,若
,
,
,
,当
的值最大时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc75953bf5dcfa4af308c34bf9952d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a873b7706a1126bf49b3d8bc7e78a27d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c46d9ae75907eb8815e73eb61716453.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f94fd82cde4150e6c9ba75697f468a0f.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bbe4cdd2c154bd9a8073b0d4cecb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1983c41ebdacc818687e43642f8fb670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab6990b8426a4c952f6b9ad99e9f188.png)
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【推荐2】如图1,在平面直角坐标系中,直线y=x﹣1与抛物线y=﹣x2+bx+c交于A、B两点,其中A(m,0)、B(4,n),与x轴交于另一点D.
![](https://img.xkw.com/dksih/QBM/2022/2/28/2926379515994112/2927580030361600/STEM/a8a2fe7a62634aa5ac6b968bf2ef90e3.png?resizew=473)
(1)求m、n的值及该抛物线的解析式;
(2)如图2,若点P为线段AD上的一动点(不与A、D重合),分别以AP、DP为斜边,在直线AD的同侧作等腰直角△APM和等腰直角△DPN,连接MN,试确定△MPN面积最大时P点的坐标;
(3)如图3,连接BD、CD,在线段CD上是否存在点Q,使得以A、D、Q为顶点的三角形与△ABD相似若存在,请直接写出点Q的坐标,请说明理由.
![](https://img.xkw.com/dksih/QBM/2022/2/28/2926379515994112/2927580030361600/STEM/a8a2fe7a62634aa5ac6b968bf2ef90e3.png?resizew=473)
(1)求m、n的值及该抛物线的解析式;
(2)如图2,若点P为线段AD上的一动点(不与A、D重合),分别以AP、DP为斜边,在直线AD的同侧作等腰直角△APM和等腰直角△DPN,连接MN,试确定△MPN面积最大时P点的坐标;
(3)如图3,连接BD、CD,在线段CD上是否存在点Q,使得以A、D、Q为顶点的三角形与△ABD相似若存在,请直接写出点Q的坐标,请说明理由.
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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
轴交于点
、
且点
,
,抛物线的对称轴与
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/7/cd1fce3a-501d-4337-a25f-6a8642300101.png?resizew=200)
(1)求二次函数的解析式;
(2)若点
是直线
上方抛物线上的一动点,连接
,
,求
面积的最大值;
(3)若点
是抛物线上一点,在直线
上是否存在一点
,使得以点
、
、
、
为顶点的四边形是平行四边形,若存在,请直接写出点
的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/979426d711e6b4ddcefc44f92d8a9062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3738bb3fced399273145e04ec3955b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fe2c124d5bbbbe666ee145cd454b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/7/cd1fce3a-501d-4337-a25f-6a8642300101.png?resizew=200)
(1)求二次函数的解析式;
(2)若点
![](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/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cbfbedd45e9f0b994bfcd51e0376fc3.png)
(3)若点
![](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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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【推荐2】在平面直角坐标系中,O为坐标原点,抛物线
交x轴于点A(l,0)、B(3,0),交y轴于点C.
(1)如图1,求抛物线的解析式;
(2)如图2,点P为对称轴右侧第四象限抛物线上一点,连接PA并延长交y轴于点K,点P横坐标为t,△PCK的面积为S,求S与t的函数关系式(直接写出自变量t的取值范围);
(3)如图3,在(2)的条件下,过点A作AD⊥AP交y轴于点D.连接OP,过点O作OE⊥OP交AD延长线于点E,当OE=OP时,延长EA交抛物线于点Q,点M在直线EC上,连接QM,交AB于点H,将射线QM绕点Q逆时针旋转45°,得到射线QN交AB于点F,交直线EC于点N,若AH:HF=3:5,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358e2987096a67189bcc2a642da39524.png)
(1)如图1,求抛物线的解析式;
(2)如图2,点P为对称轴右侧第四象限抛物线上一点,连接PA并延长交y轴于点K,点P横坐标为t,△PCK的面积为S,求S与t的函数关系式(直接写出自变量t的取值范围);
(3)如图3,在(2)的条件下,过点A作AD⊥AP交y轴于点D.连接OP,过点O作OE⊥OP交AD延长线于点E,当OE=OP时,延长EA交抛物线于点Q,点M在直线EC上,连接QM,交AB于点H,将射线QM绕点Q逆时针旋转45°,得到射线QN交AB于点F,交直线EC于点N,若AH:HF=3:5,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c005fd3f384bd30acddbf95b5bd13b5.png)
![](https://img.xkw.com/dksih/QBM/2018/4/9/1920239572230144/1921075654672384/STEM/5426d52bf99647d18511b4f53ce66e53.png?resizew=544)
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解答题-问答题
|
较难
(0.4)
【推荐3】如图①,已知二次函数,
的图像与x轴负半轴交于A、B两点,与y轴正半轴交于点C,点A的坐标为
,
是
与
的比例中项.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/afebae2a-085b-46a4-a598-32d0471833c4.png?resizew=417)
(1)直接写出
,
;
(2)如图②,点 M
是抛物线上异于点 B 的一点,连接
,设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4355d4e36b37a786a3cd75dc9052316f.png)
①当
且
时,求n的值;
②是否存在某个k的值,使得抛物线上恰好有3个点M符合题意?若存在,求出k的值;若不存在,请说明理由;
(3)如图③,动点P从点A出发,以每秒1个单位长度的速度向点O运动,同时动点Q从点O出发,以每秒2个单位长度的速度沿y轴正方向运动,当点P到达点O时,两点同时停止运动,矩形
的顶点D在第二象限,点E是
边上一点,连接
,在点P与点Q运动过程中,
的最小值为4,请直接写出点E 的横坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab979573ebf184127b7117aa9c330d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/afebae2a-085b-46a4-a598-32d0471833c4.png?resizew=417)
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75fe228f0be9d31babce9a2ad23723d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82d3c01973141f95f1fdb98b2c657b30.png)
(2)如图②,点 M
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b5e761af39bc1725915c3c9ee7febee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4106cbf031130dc2549d866e77543295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4355d4e36b37a786a3cd75dc9052316f.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c34fef0d2beddcdea42aa7c291433ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e69866076dcff686a05e9e91e61e68.png)
②是否存在某个k的值,使得抛物线上恰好有3个点M符合题意?若存在,求出k的值;若不存在,请说明理由;
(3)如图③,动点P从点A出发,以每秒1个单位长度的速度向点O运动,同时动点Q从点O出发,以每秒2个单位长度的速度沿y轴正方向运动,当点P到达点O时,两点同时停止运动,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8735e2de0ec29640d1eff9e043556030.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ea2bbfdbf160d9397de924f544a245.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75706490b5592bfa706fe417ae9e08b2.png)
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