如图
,抛物线
交
轴于
,交
轴于
是第一象限内抛物线上的一个动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/55da3b79-0948-4a6e-b657-64348abae0a5.png?resizew=263)
(1)求抛物线的表达式;
(2)连接
,相交于点
,令
,当
的值最大时,求点
的坐标;
(3)如图
,抛物线的对称轴与
轴交于点
,直线
分别与对称轴交于点
,
与
的面积分别为
.设点
的横坐标为
,当
时,
的值是否变化?如果不变,求出
的值;如果变化,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](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/371a49193278098a5ed8f701d91cf666.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5b056acdb4b669c8df083de4b9ef641.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/55da3b79-0948-4a6e-b657-64348abae0a5.png?resizew=263)
(1)求抛物线的表达式;
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c521badf0116ef70e52379bf77701a1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da8e919ed4713d5735c1349c686d581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/6acf9e2f45e625cbc6d26dd5e292edd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e323c08b18488d11bd8f3cd74efa971a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1119c729df3b5285dddca42def31bc9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2578b9b66df3cb080f572564c87ad60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b0e17dfc63c448783e1a8c3aed9267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c21cbb1c2bcbcb8391ac5a879f2ae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c21cbb1c2bcbcb8391ac5a879f2ae0.png)
更新时间:2024-02-27 16:19:52
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在平面直角坐标系
中,抛物线
与直线
交于
,
两点(点
在
轴上),与
轴交于点
,且
.
(2)若
为直线
下方抛物线上的一个动点,过点
作
交
于点
,交
轴于点
.
①求线段
的最大值;
②是否存在点
,使得四边形
为等腰梯形?若存在,请求出点
的横坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2beb91f10d2d8f2aa0dcc3f5cd1598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b77527caa01efcfc28dadcc959af94e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1bb89aec41e32d27b5f0914c494dead.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/5963abe8f421bd99a2aaa94831a951e9.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b3f839ce88bf970aceb44ab939bd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
①求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
②是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b5c267d261fa8eb2d0a958f071a702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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,抛物线
(
、
为常数)的对称轴为直线
,且经过点
.
(2)当
时,二次函数的最大值是______,最小值是______;
(3)当
时,若二次函数的最大值和最小值的差为
,求
的值;
(4)点
在抛物线上,横坐标为
,过点
作直线
平行于
轴,交抛物线于另一点
.抛物线上另有两点
、
,横坐标分别为
和
,
、
两点之间的部分
不包括
、
两点
记作图象
.若图象
上恰好有三个点到直线
的距离为
,请直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6554ac3dff4a59833e407db887f6e6.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92d41e173f51460bf0573cb3ac27e61.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb9e5fdd911a03ea15e78d47b50c4adf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(4)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29418e5014731850c55565b6bf47aa41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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
|
较难
(0.4)
真题
【推荐1】如图,已知直线
与抛物线
:
相交于
和点
两点.
![](https://img.xkw.com/dksih/QBM/2019/6/17/2227582608654336/2233927482490880/STEM/f1f5cfe2807a484dabdfd8b2f76c1482.png?resizew=155)
⑴求抛物线
的函数表达式;
⑵若点
是位于直线
上方抛物线上的一动点,以
为相邻两边作平行四边形
,当平行四边形
的面积最大时,求此时四边形
的面积
及点
的坐标;
⑶在抛物线
的对称轴上是否存在定点
,使抛物线
上任意一点
到点
的距离等于到直线
的距离,若存在,求出定点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96dde9c4aad0536c069127df0d4b12f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ebcc1ae11373d4d0e0aa571f98d9666.png)
![](https://img.xkw.com/dksih/QBM/2019/6/17/2227582608654336/2233927482490880/STEM/f1f5cfe2807a484dabdfd8b2f76c1482.png?resizew=155)
⑴求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
⑵若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20c883bc7c4f49ce4a1a1a6e5d674e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab3e0100e6788858ab43861933dd248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab3e0100e6788858ab43861933dd248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab3e0100e6788858ab43861933dd248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
⑶在抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7a9836a301775c5649a55447aac1ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】抛物线
与x轴的交点为
,B,与y轴交于点C.
(1)求抛物线的解析式;
(2)P为抛物线第一象限上的一点,若
,求点P的坐标;
(3)M为抛物线在点B右侧上的一点,M与N两点关于抛物线的对称轴对称,
,
交y轴于点E、D,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99e78aa283b598be4d38746431a4b771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f911e0ed2429ab67c269cb0ff60ef218.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/12/c8e0b310-661c-4ad3-8fd1-94d75feb82e3.png?resizew=260)
(1)求抛物线的解析式;
(2)P为抛物线第一象限上的一点,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e02a1fff2e22995046bd08e2e70ed3.png)
(3)M为抛物线在点B右侧上的一点,M与N两点关于抛物线的对称轴对称,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4cb4069a2e1e90d1a9c4979ad09ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1165830b314a0dab65ea267e82bd3f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e7f943684dca5791bd80f5753d6be82.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xoy中,Rt△AOB的斜边OB在x轴上,其中∠ABO=30°,OB=4.
![](https://img.xkw.com/dksih/QBM/2011/12/25/1573316494262272/1573316517576704/STEM/9a0beed4aee0420ca426aa713251a7e1.png?resizew=514)
(1)直接写出,Rt△AOB的内心和P的坐标;
(2)如图2,若将Rt△AOB绕其直角顶点A顺时针旋转α度(0°<α<90°),得到Rt△ACD,直角边AD与x轴相交于点N,直角边AC与y轴相交于点M,连结MN.设△MON的面积为S△MON,△AOB的面积为S△AOB,以点M为圆心,MO为半径作⊙M,
①当直线AD与⊙M相切时,试探求S△MON与S△AOB之间的关系.
②当S△MON=
S△AOB时,试判断直线AD与⊙M的位置关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/2011/12/25/1573316494262272/1573316517576704/STEM/9a0beed4aee0420ca426aa713251a7e1.png?resizew=514)
(1)直接写出,Rt△AOB的内心和P的坐标;
(2)如图2,若将Rt△AOB绕其直角顶点A顺时针旋转α度(0°<α<90°),得到Rt△ACD,直角边AD与x轴相交于点N,直角边AC与y轴相交于点M,连结MN.设△MON的面积为S△MON,△AOB的面积为S△AOB,以点M为圆心,MO为半径作⊙M,
①当直线AD与⊙M相切时,试探求S△MON与S△AOB之间的关系.
②当S△MON=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10402e4ddd0d323cc1ae83801ae976db.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
解题方法
【推荐2】如图,AB是
ABC的外接圆O的直径,点D在半圆上,DC与AB交于点E,过点C作CF⊥DC交DB的延长线于点F,交圆O于点G.
(1)求证:
ABC∽
DCF;
(2)当∠1=∠2,DF=10
,AE:EC=1:2时,求圆O的半径.
(3)在(2)的条件下,连接DG交BC于点M,则
(直接写出答案).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(2)当∠1=∠2,DF=10
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
(3)在(2)的条件下,连接DG交BC于点M,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e33eb823b56911f1a3dc466ed36f9c.png)
![](https://img.xkw.com/dksih/QBM/2021/12/13/2871478461169664/2872194468536320/STEM/8b247d394b344fe28043dbc572dcafa6.png?resizew=330)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐3】爱好思考的小茜在探究两条直线的位置关系查阅资料时,发现了“中垂三角形”,即两条中线互相垂直的三角形称为“中垂三角形”.如图(1)、图(2)、图(3)中,AF、BE是△ABC的中线,AF⊥BE于点P,像△ABC这样的三角形均为“中垂三角形”.设BC=a,AC=b,AB=c.
![](https://img.xkw.com/dksih/QBM/2022/3/29/2946489031540736/2965653492981760/STEM/e0aaf328a7bb497ba03066f6191cdc1e.png?resizew=324)
【特例探究】
(1)如图1,当∠PBA=45°,c=4
时,a= ,b= ;
如图2,当∠PAB=30°,c=2时,a= ,b= ;
【归纳证明】
(2)请你观察(1)中的计算结果,猜想a2、b2、c2三者之间的关系,用等式表示出来,并利用图3证明你的结论.
![](https://img.xkw.com/dksih/QBM/2022/3/29/2946489031540736/2965653492981760/STEM/e0aaf328a7bb497ba03066f6191cdc1e.png?resizew=324)
【特例探究】
(1)如图1,当∠PBA=45°,c=4
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
如图2,当∠PAB=30°,c=2时,a= ,b= ;
【归纳证明】
(2)请你观察(1)中的计算结果,猜想a2、b2、c2三者之间的关系,用等式表示出来,并利用图3证明你的结论.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】在
中,
为
边上一动点(点
与点
不重合),联结
.过点
作
交边
于点
.
(1)如图,当
时,求
的长;
(2)设
,求
关于
的函数解析式并写出函数定义域;
(3)把
沿直线
翻折得
,联结
,线段
与射线
交于点
,当
是等腰三角形时,直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e052a22921698acaae1f2f64d4bc44e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4a32884afd5c49777628d70827a9d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/9/07b8833f-a1d8-4368-8788-a56736e86879.png?resizew=358)
(1)如图,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c22eb62f36ff06a8cf5a17ba19a10c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d04aec2dfd4e2db4e0a846e5cd77db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ada91813a8e1bcdaf60db6d10a0650f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943712a5e96b16cc15d775cc4687237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffb952f86442845da723fd291564484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdbbd875a377facfe4b9abc936a8829a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】将一个直角三角形片
,放置在平面直角坐标系中,点
,点
,点
.过边
的动点
(点
不与点
重合)作于
点
,沿着
折叠该纸片,得顶点
的对应点
.设,折叠后的
与四边形
重叠部分的面积为
.
![](https://img.xkw.com/dksih/QBM/2019/5/7/2198461001408512/2198745601122304/STEM/c03fb5a8c7e241328776326b39ced4f7.png?resizew=419)
(1)填空:
度;直接写出直线
的函数解析式 .如图①,当点
与顶点
重合时,直接写出点
的坐标 .
(2)点
是直线
上的一点,若
,求点
的坐标.
(3)当
落在第二象限,
与
相交于点
,求出
关于
的函数关系式;并写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc83f34b5a3c1dc09d990ce4bdc8e078.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d026d2298b74855ce6b9550ed60bcb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49cba284d675a3028d7a8d54f1f8ae70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b62194097ac66a5093c57fca2f5b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9cda46e575acf64941ea0964b89ee99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f479d987bc7abd828c64f9dc745836ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6133606e8415f52b2abdf33804ee7860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682324af3ebf7896f8094284fd224e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/2019/5/7/2198461001408512/2198745601122304/STEM/c03fb5a8c7e241328776326b39ced4f7.png?resizew=419)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5966b0a741014db0a8c9e4da29e394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)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/64384a71a332dafda136cb816e632e00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42198b8e646ccfbbec323fd364c4d90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.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
|
较难
(0.4)
【推荐3】若凸四边形的两条对角线所夹锐角为
,我们称这样的凸四边形为“美丽四边形”.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/9/603a9963-10b3-4483-be47-18589484a994.png?resizew=415)
(1)①在“平行四边形、梯形、菱形、正方形”中,一定不是“美丽四边形”的有 ;
②若矩形
是“美丽四边形”,且
,则
;
(2)如图1,“美丽四边形”
内接于⊙O,
与
相交于点P,且对角线
为直径,
,求另一条对角线
的长;
(3)如图2,平面直角坐标系中,已知“美丽四边形”
的四个顶点
,B在第三象限,D在第一象限,
与
交于点O,且四边形
的面积为
,若二次函数
(a、b、c为常数,且
)的图象同时经过这四个顶点,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/9/603a9963-10b3-4483-be47-18589484a994.png?resizew=415)
(1)①在“平行四边形、梯形、菱形、正方形”中,一定不是“美丽四边形”的有 ;
②若矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e2a96ad10f818c9a5ad7ef46a304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/140e540849151c98a71e423aa443b39e.png)
(2)如图1,“美丽四边形”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5ebf88c7bfb4aed03160c268b5b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
(3)如图2,平面直角坐标系中,已知“美丽四边形”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76f9a67906cb9d38a07a373f9865c3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14fc6d812e0f2a7ff2b7bb4f4c92369d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a64103561364ac4c9460a72c9e154bb.png)
您最近一年使用:0次