在平面直角坐标系中,点
为坐标原点,直线
交x轴于点C,交y轴于点A,点B在x轴负半轴上,
.
(1)如图1,求点C的坐标;
(2)如图2,点D是
上一点(D不与A、B重合),连接
交y轴于点E,过A的直线
交x轴负半轴于点F,连接
,
,求直线
的解析式:
(3)在(2)的条件下,如图3,M为第二象限直线
上一点,连接
交
于点N,P为
上一点,连接
、
,
,
的面积为18,求点P到直线
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04321fa33436854a94f03edc3223ce6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16cc654e2abf59ffb630243dea244a7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/62ca30b2-aad5-4e32-97bf-c9e8ee712f7d.png?resizew=360)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/4efe13e4-8843-4975-b2a5-416f56d89f17.png?resizew=499)
(1)如图1,求点C的坐标;
(2)如图2,点D是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cf73b4e244279594a181af30f8b148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(3)在(2)的条件下,如图3,M为第二象限直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83640592853a53872d7af69c0cffc1bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
更新时间:2024-03-06 15:22:02
|
相似题推荐
解答题-问答题
|
困难
(0.15)
【推荐1】如图,在平面直角坐标系中,二次函数
的图像交
轴于
,
两点,交
轴于点
,连接
,已知
.
![](https://img.xkw.com/dksih/QBM/2020/5/19/2466167622393856/2466735807111168/STEM/f266890a-43e8-4061-af0d-8ea6bef78715.png)
(1)点
的坐标是______;
(2)若点
是抛物线上的任意一点,连接
、
.
①当
与
的面积相等时,求点
的坐标;
②把
沿着
翻折,若点
与抛物线对称轴上的点
重合,直接写出点
的横坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b4c83fea9583fcebeb66b5608c666.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/859bf9cae1ba707d53066042073251f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57d42202229c3c9d2b849b7d86a3993e.png)
![](https://img.xkw.com/dksih/QBM/2020/5/19/2466167622393856/2466735807111168/STEM/f266890a-43e8-4061-af0d-8ea6bef78715.png)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
②把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】如图1,在平面直角坐标系xOy中,双曲线
与直线y=ax+b(a≠0)交于A、B两点,直线AB分别交x轴、y轴于C、D两点,E为x轴上一点.已知OA=OC=OE,A点坐标为(3,4).
(1)将线段OE沿x轴平移得线段O′E′(如图1),在移动过程中,是否存在某个位置使|BO′﹣AE′|的值最大?若存在,求出|BO′﹣AE′|的最大值及此时点O′的坐标;若不存在,请说明理由;
(2)将直线OA沿射线OE平移,平移过程中交
的图象于点M(M不与A重合),交x轴于点N(如图3).在平移过程中,是否存在某个位置使△MNE为以MN为腰的等腰三角形?若存在,求出M的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d49d34012ddf68fb981eb4975ac99b9.png)
(1)将线段OE沿x轴平移得线段O′E′(如图1),在移动过程中,是否存在某个位置使|BO′﹣AE′|的值最大?若存在,求出|BO′﹣AE′|的最大值及此时点O′的坐标;若不存在,请说明理由;
(2)将直线OA沿射线OE平移,平移过程中交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03517310ea1e913f709753592ac65ffd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/a8a682fc-e329-41cc-905e-2a9e31cb1d95.png?resizew=446)
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名校
【推荐1】在
中,
,P为直线
上一动点, 连接
, 取
的中点
,将线段
绕点 C顺时针旋转到
,旋转角为α,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/b40a4a0f-0ca9-49da-a5f3-efc90984598d.png?resizew=381)
(1)当点P在
延长线上,且
时,解决以下问题.
①如图1,
与
相交于H, 若
,
,连接
,求
的长;
②如图2,当N落在
上时,取
的中点E, 连接
.点D为
上一点, 满足
, 求证:
.
(2)如图3,已知
,
,
. 连接
、
, 当
取得最小值时,直接写出四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/b40a4a0f-0ca9-49da-a5f3-efc90984598d.png?resizew=381)
(1)当点P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9e8058ecfba287885cb97e65e3f577.png)
①如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc977ada53b23c9ac90033fc87f273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e443c88e7f2128069787c2285ef9c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97541433d53de25284bb68399ac1d105.png)
②如图2,当N落在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d567bdeba9b8e17d0911f594e141eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/847279272c47f17aac7d5a8d896cebaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c672f6dbbe383f376483840b452c248e.png)
(2)如图3,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d03f73bec20b60bc7608972607f5a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c023f4b501684abd869b36d6e6c7f21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279563c3c055777ce1aa369a2ef54aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d63279a231f5e49d46d289a675dc5d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b58405bdc96fc2046bed838ccdb5a6.png)
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解答题-问答题
|
困难
(0.15)
【推荐2】抛物线
与
轴交于点
和点
,与
轴交于点
.
(1)写出抛物线的对称轴,并求
的值;
(2)如图1,
,点
是抛物线上
的动点,直线
与抛物线的另一个交点为
.
①若
、
关于点
对称,求
点坐标;
②若点
是
轴上一点,直线
的表达式为
,直线
的表达式为
,当
的值是一个定值时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddcf1c1428478e1046eced45681613e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/2/bba2b991-bc2e-4721-b179-27035a205ad9.png?resizew=359)
(1)写出抛物线的对称轴,并求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e93a87901a645bb6f3f6a70596c064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d70439b201575f4e1d028854b891aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
①若
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
②若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ac8cdda4f66904b6e2676689c40dbde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b3c8be9aee074c9a3203abace248ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f06443b381a16ea4a5e39e19794a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69e3f7ddd51215d00661c09cd900d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐1】如图,在
中,
,
,点
为
中点,点
为边
上一动点,点
为射线
上一动点,且
.
(1)当
时,连接
,求
的余切值;
(2)当点
在线段
上时,设
,
,求
关于
的函数关系式,并写出
的取值范围;
(3)连接
,若
为等腰三角形,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d30f9b7a6123f13fa0793ead76dc651a.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881b0d47457539e98db917b95c186eae.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cba2469e962966fd04c3b8e1b2c9d4c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3b0b11a80e8b107e55534d7fda9f2b.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c30f73c718bde8352055a14987fc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10b9f48b80427d1ec649873cb6aac731.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc4b17ce6e90cd3810a3696262e94c1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/2020/1/7/2371798531497984/2371838674280448/STEM/20bfceb92b944b8dae57fe6169bf66fb.png?resizew=417)
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解答题-证明题
|
困难
(0.15)
解题方法
【推荐2】
为圆
的弦,
平分
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/2/9bf1d0f0-8a77-4c46-b87d-8fa036b2130d.png?resizew=399)
(1)如图1,求证:
;
(2)如图2,连接
并延长交圆
于点
,连接
,作
于点
,延长
交
于点
,求证:
;
(3)如图3,在(2)的条件下,连接
,延长
交圆
于点
,连接
并延长,与
的延长线交于点
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/2/9bf1d0f0-8a77-4c46-b87d-8fa036b2130d.png?resizew=399)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5142949086fdc50bacd01b9ab9202320.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8944bb1af77920b5018eebf3af16b2b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13aad1de92bc27ce203cbda8ad6672e6.png)
(3)如图3,在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aaab2487cdd71739e70699461cd464b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
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【推荐1】若二次函数
的图象与x轴、y轴分别交于点A(3,0)、B(0,-2),且过点C(2,-2).
(1)求二次函数表达式;
(2)若点
为抛物线上第一象限内的点,且
,求点
的坐标;
(3)在抛物线上
下方)是否存在点
,使
?若存在,求出点
到
轴的距离;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9553fb9beb9ed49ea5f7a0f077884d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/19/74b02f18-ecf3-4a96-9ed7-cf850a3f7517.jpg?resizew=268)
(1)求二次函数表达式;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b59495e1fdb4fad80c3b4e71e5214c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)在抛物线上
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9472e897f2f106728f220fe3b326d031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ceab7e373905ea5daa6ff1e94c6ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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解答题-证明题
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困难
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名校
【推荐2】如图,在等腰
中,
,点
为线段
的中点,点
、
分别为线段
和射线
上一动点,连接
.
(1)如图1,若
,
,
,
,求线段
的长.
(2)如图2,连接
,线段
分别交线段
、
于点
、
,若点
为线段
的中点,且
,猜想线段
和
之间存在的数量关系,并证明你的猜想.
(3)如图3,若
,
,
,
为线段
上一点,当
取得最小值时,连接
,将线段
绕点
逆时针方向旋转
得线段
,连接
交
于点
且
,记
,
,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.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/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3064b70f24e9bbcab76e0dc61274b9b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/9/1bd76974-2493-4fb3-8244-d629e306231a.png?resizew=299)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdb266e7786cbe16e1208b7eda0d7d5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d05c74349381d6a5cdfaa390afd9822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59182f25fcf22afc79e28ded936de018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39addc1173a458af87ed5c5e3f06466.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3064b70f24e9bbcab76e0dc61274b9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3064b70f24e9bbcab76e0dc61274b9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8abc38fc3735372433882632bc5f746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a16f5621716bfef7a056a3f2712feb4.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59182f25fcf22afc79e28ded936de018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3064b70f24e9bbcab76e0dc61274b9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/155e5b8f37cdc0c846422251c2c864d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168c117ff8b3ddc5dad76c88e77701b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03b2186e1c25cc1a02d5d7a0fe95210a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4cbe757b85545a92b8297246772a3c.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐3】根据所给的基本材料,请你进行适当的处理,编写一道综合题.
编写要求:①提出具有综合性、连续性的三个问题;②给出正确的解答过程;③写出编写意图和学生答题情况的预测.
材料①:如图,先把一矩形纸片ABCD对折,得到折痕MN,然后把B点叠在折痕线上,得到△ABE,再过点B把矩形ABCD第三次折叠,使点D落在直线AD上,得到折痕PQ.当沿着BE第四次将该纸片折叠后,点A就会落在EC上.
![](https://img.xkw.com/dksih/QBM/2019/5/21/2208353770668032/2213474167554048/STEM/e6de1ed74bc64b2ebba2d0d361a4b43d.png?resizew=310)
材料②:已知AC是∠MAN的平分线.
(1)在图1中,若∠MAN=120°,∠ABC=ADC=90°,求证:AB+AD=AC;
(2)在图2中,若∠MAN=120°,∠ABC+∠ADC=180°,则(1)中的结论是否仍然成立?若成立,请给出证明;若不成立,请说明理由;
(3)在图3中:若∠MAN=α(0°<α<180°),∠ABC+∠ADC=180°,
则AB+AD=_____AC(用含α的三角函数表示).
![](https://img.xkw.com/dksih/QBM/2019/5/21/2208353770668032/2213474167554048/STEM/8d8ee0b2027346fd880f814cf3c3245a.png?resizew=405)
材料③:
已知:如图甲,在Rt△ACB中,∠C=90°,AC=4cm,BC=3cm,点P由B出发沿线段BA向点A匀速运动,速度为1cm/s;点Q由A出发沿线段AC向点C匀速运动,速度为2cm/s;连接PQ,设运动的时间为t(s)(0<t<2).
![](https://img.xkw.com/dksih/QBM/2019/5/21/2208353770668032/2213474167554048/STEM/cb0bcac3a9154ab9aec91587df92f1a6.png?resizew=247)
编写试题选取的材料是_____(填写材料的序号)
编写的试题是:(1)设△AQP的面积为y(cm2),求y与t之间的函数关系式.
(2)是否存在某一时刻t,使线段PQ恰好把Rt△ACB的周长和面积同时平分?若存在,求出此时t的值.
(3)如图(2),连接PC,并把△PQC沿QC翻折得到四边形PQP'C.是否存在某一时刻t,使四边形PQP'C为菱形?若存在,求出此时菱形的边长.
试题解答(写出主要步骤即可).
编写要求:①提出具有综合性、连续性的三个问题;②给出正确的解答过程;③写出编写意图和学生答题情况的预测.
材料①:如图,先把一矩形纸片ABCD对折,得到折痕MN,然后把B点叠在折痕线上,得到△ABE,再过点B把矩形ABCD第三次折叠,使点D落在直线AD上,得到折痕PQ.当沿着BE第四次将该纸片折叠后,点A就会落在EC上.
![](https://img.xkw.com/dksih/QBM/2019/5/21/2208353770668032/2213474167554048/STEM/e6de1ed74bc64b2ebba2d0d361a4b43d.png?resizew=310)
材料②:已知AC是∠MAN的平分线.
(1)在图1中,若∠MAN=120°,∠ABC=ADC=90°,求证:AB+AD=AC;
(2)在图2中,若∠MAN=120°,∠ABC+∠ADC=180°,则(1)中的结论是否仍然成立?若成立,请给出证明;若不成立,请说明理由;
(3)在图3中:若∠MAN=α(0°<α<180°),∠ABC+∠ADC=180°,
则AB+AD=_____AC(用含α的三角函数表示).
![](https://img.xkw.com/dksih/QBM/2019/5/21/2208353770668032/2213474167554048/STEM/8d8ee0b2027346fd880f814cf3c3245a.png?resizew=405)
材料③:
已知:如图甲,在Rt△ACB中,∠C=90°,AC=4cm,BC=3cm,点P由B出发沿线段BA向点A匀速运动,速度为1cm/s;点Q由A出发沿线段AC向点C匀速运动,速度为2cm/s;连接PQ,设运动的时间为t(s)(0<t<2).
![](https://img.xkw.com/dksih/QBM/2019/5/21/2208353770668032/2213474167554048/STEM/cb0bcac3a9154ab9aec91587df92f1a6.png?resizew=247)
编写试题选取的材料是_____(填写材料的序号)
编写的试题是:(1)设△AQP的面积为y(cm2),求y与t之间的函数关系式.
(2)是否存在某一时刻t,使线段PQ恰好把Rt△ACB的周长和面积同时平分?若存在,求出此时t的值.
(3)如图(2),连接PC,并把△PQC沿QC翻折得到四边形PQP'C.是否存在某一时刻t,使四边形PQP'C为菱形?若存在,求出此时菱形的边长.
试题解答(写出主要步骤即可).
您最近一年使用:0次