如图,在平面直角坐标系中,抛物线
经过坐标原点,与x轴正半轴交于点A,点
是抛物线上一动点.
(1)如图1,当
,
,且
时,
①求点M的坐标:
②若点
在该抛物线上,连接OM,BM,C是线段BM上一动点(点C与点M,B不重合),过点C作
,交x轴于点D,线段OD与MC是否相等?请说明理由;
(2)如图2,该抛物线的对称轴交x轴于点K,点
在对称轴上,当
,
,且直线EM交x轴的负半轴于点F时,过点A作x轴的垂线,交直线EM于点N,G为y轴上一点,点G的坐标为
,连接GF.若
,求证:射线FE平分
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/572f286fb45b2757af63569ae0bc2e99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc5dd4d07e2098d8d1b731f2622867f.png)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa2885b26fd22ccf1c35735442e34d74.png)
①求点M的坐标:
②若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b424956eb33e6f0fbf91cdcbfdf5cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/118f1e738e9e77e07db0f749b32bd1b8.png)
(2)如图2,该抛物线的对称轴交x轴于点K,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0fae234951a3481a09822cbb1d0e144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17bda892497cea43df67db57b4e2a07a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee36088df616bc990ef78ca5706aea1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af117a82f33d88974b164f1ed78bcb84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67868a097fc9997cfc7fbbbfb7dcb2d3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/3/d46ba5a3-2b4c-4656-bca7-abfe3cc0c51c.png?resizew=553)
2021·内蒙古·中考真题 查看更多[2]
更新时间:2021-06-29 15:21:57
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,已知直线AB经过点
,且与x轴交于点
,与y轴交于点B,作直线AB关于y轴对称的直线BC交x轴于点C,点P为OC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/57f877d6-9fd3-4e69-bc0a-3c13d3336ea3.png?resizew=178)
(1)求直线AB的函数表达式和点B的坐标;
(2)若经过点P的直线l将
的面积分为
的两部分,求所有符合条件的直线l的函数表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48befa5d90fafd8bfdb6c90fd241ebfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/57f877d6-9fd3-4e69-bc0a-3c13d3336ea3.png?resizew=178)
(1)求直线AB的函数表达式和点B的坐标;
(2)若经过点P的直线l将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5881f1ce9b4172ca346032d0fd1e3d.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】材料1:在设计人体雕塑时,存在一个分隔点,使雕塑的上部(腰以上)与下部(腰以下)之比,等于下部与全部(全身)之比,可以增加视觉美观,数学上把这个点叫“黄金分割点”. 为了研究这个点,我们在线段AB上取点C(如图1),点C把AB分成AC和CB两段,其中BC是较小的一段,现要使
即可.为了简便起见,设AB=1,AC=x,则CB=1-x,代入
,即
,也即x2+x-1=0,解之得,
.所以
=
,人们把
这个数叫黄金分割数,点C叫“黄金分割点”.
材料2:由线段的黄金分割点联想到图形的“黄金分割线”,类似地给出“黄金分割线”的定义:直线l将一个面积为S的图形分成面积为S1和面积为S2的两部分(设S1<S2),如果
,那么称直线l为该图形的“黄金分割线”.
(1)如图2,点C是线段AB的黄金分割点(AC>CB),取线段AB的中点O,作点C关于点O的对称点
,则
;继续取线段AC的中点
,作点
关于点
的对称点
,试猜想点
是否线段A
的黄金分割点,若是,请证明,若不是,请说明理由;
(2)如图3,在平面直角坐标系中, A(-
,0),B(1,0),C(4-
,2),求△ABC中经过点C的“黄金分割线”解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd2dee4fe5fa66128ba27f0b83da5663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd2dee4fe5fa66128ba27f0b83da5663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0af1cc284f346649b527290b3222c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c86cb753ef281db76db9f9fffea1a998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd2dee4fe5fa66128ba27f0b83da5663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029d393bb07b7140905b85f550519de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029d393bb07b7140905b85f550519de4.png)
材料2:由线段的黄金分割点联想到图形的“黄金分割线”,类似地给出“黄金分割线”的定义:直线l将一个面积为S的图形分成面积为S1和面积为S2的两部分(设S1<S2),如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6e25f03777090ebe48854c8e405864d.png)
(1)如图2,点C是线段AB的黄金分割点(AC>CB),取线段AB的中点O,作点C关于点O的对称点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d802e44c9ea1fe9698a97c666d5010dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c578d3a17de6f47abaaeca5ab778e7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c578d3a17de6f47abaaeca5ab778e7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
(2)如图3,在平面直角坐标系中, A(-
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://img.xkw.com/dksih/QBM/2020/3/12/2418090852925440/2419146192166912/STEM/652161eae35f4b98b94147b8d98788e1.png?resizew=646)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图,已知
,
,A为y轴正半轴上一点,点D为第二象限一动点,E在
的延长线上,
交
于F,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/51fcb1ee-340f-4d4b-8320-0a500117a3ea.png?resizew=367)
(1)求证:
;
(2)求证:
平分
;
(3)若在D点运动的过程中,始终有
在此过程中,
的度数是否变化?如果变化,请说明理由;如果不变,请求出
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42f05b013e4b7166cbc87c5a83d6a85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca0b4afd16b79370532de44989d6c43d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96e7bab75a17d48dd9d1d29ef86dc25f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/51fcb1ee-340f-4d4b-8320-0a500117a3ea.png?resizew=367)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c1016bc9ef1c728bccf070a6e4a532f.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d19f963f7c803bcfcbb265ec6d4304.png)
(3)若在D点运动的过程中,始终有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b13650b62deb3f3323ea4af7cf95f20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
您最近一年使用:0次
【推荐2】如图,在
中,
,点
是
边上的动点,连接
,以
为斜边在
的下方作等腰直角三角形
.
(1)填空:
的面积等于 ;
(2)连接
,求证:
是
的平分线;
(3)点
在
边上,且
, 当
从点
出发运动至点
停止时,求点
相应的运动路程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0740f04e70940c6306efc58d7338e28.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
(3)点
![](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/fd1e747ae9b46583dfcc07127c0cd638.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐1】已知抛物线y=ax2+bx+3的图象与x轴相交于点A和点B(1,0),与y轴交于点C连接AC,有一动点D在线段AC上运动,过点D作
轴的垂线,交抛物线于点E,交
轴于点F,AB=4,设点D的横坐标为m.
(1)求抛物线的解析式.
(2)连接AE、CE,当△ACE的面积最大时,求点D的坐标.
(3)当m为何值时,△CDE是等腰三角形.
(4)连接BC,当∠EAD=∠OCB时,请直接写出此时点D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求抛物线的解析式.
(2)连接AE、CE,当△ACE的面积最大时,求点D的坐标.
(3)当m为何值时,△CDE是等腰三角形.
(4)连接BC,当∠EAD=∠OCB时,请直接写出此时点D的坐标.
![](https://img.xkw.com/dksih/QBM/2021/1/28/2645900987752448/2650955822129152/STEM/bcf09f12-b8c7-4d15-a783-2cb62bce47fd.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】在正方形ABCD中,E是BC中点,F是CD上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/104c1b15-de0b-4783-b60d-7644cfb5840a.png?resizew=345)
(1)如图1,求证:
;
(2)如图2,连接DE,延长FE交AB的延长线于点G,过点B作
交AD于点H,垂足为M,交AE于点N,在不添加任何辅助线的情况下,请直接写出图2中的所有等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77c1441979b0a396730e612eb9ac408c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/104c1b15-de0b-4783-b60d-7644cfb5840a.png?resizew=345)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7521601ac1fbc4a52d4fe44be9c8e88c.png)
(2)如图2,连接DE,延长FE交AB的延长线于点G,过点B作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26051568b85a51dc567fff9f7acacd9a.png)
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,拋物线
与
轴交于
两点,与
轴交于点
,抛物线的对称轴是直线
,已知点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/d016175e-a89c-4ee7-a8aa-74b20339b283.png?resizew=172)
(1)求抛物线的解析式;
(2)
是线段
上的一个动点,过点
作
轴,延长
交抛物线于点
,求线段
的最大值及此时点
的坐标;
(3)在
轴上是否存在一点
,使得
?若存在,求点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ffc12c0f0e4be8074472571c9079cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff762048f9e815d56c818e0d7db250b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/d016175e-a89c-4ee7-a8aa-74b20339b283.png?resizew=172)
(1)求抛物线的解析式;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/f510d788e893ee3410ae313658822bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d48098eece9fce567ea0d0b8a8fd7556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】已知抛物线:
与x轴交点为
(A在B的左侧),顶点为D.
(1)求点
的坐标及抛物线的对称轴;
(2)若直线
与抛物线交于点
,且
关于原点对称,求抛物线的解析式;
(3)如图,将(2)中的抛物线向上平移,使得新的抛物线的顶点
在直线l:
上,设直线l与y轴的交点为
,原抛物线上的点P平移后的对应点为点Q,若
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/914f73550ca9933fb23412d94e36ab3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae6f48b9a53c0155a692509cf31f7e6.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae6f48b9a53c0155a692509cf31f7e6.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4541bd6a12515d83b3a2ba8378fed1d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f44755c5fee4b90266eac73ad47a128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f44755c5fee4b90266eac73ad47a128.png)
(3)如图,将(2)中的抛物线向上平移,使得新的抛物线的顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aea51b1e91f66368a1066b0c3f330be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e535778a4d8244ab9a7866cf303d4520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ad58997b9dc0b341c9af08f0cd1fbe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/02255511-762e-4225-875b-450cbdd35182.png?resizew=165)
您最近一年使用:0次