在平面直角坐标系
中,已知点
和
,对于点
定义如下:以点
为对称中心作点
的对称点,再将对称点绕点
逆时针旋转90°,得到点
,称点
为点
的反转点.已知
的半径为1.
,
,点
在
上,点
为点
的反转点.
①当点
的坐标为
时,在图中画出点
;
②当点
在
上运动时,求线段
长的最大值;
(2)已知点
是
上一点,点
和
是
外两个点,点
为点
的反转点.若点
在第一象限内,点
在第四象限内,当点
在
上运动时,直接写出线段
长的最大值和最小值的差.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c179fe7eff7abfdd092b63c9c1b82d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e5eea5f7f98ca8632358b7e49ceb25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
①当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
②当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/dad2a36927223bd70f426ba06aea4b45.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
22-23九年级上·北京西城·期中 查看更多[4]
(已下线)北京市第四中学2022--2023学年九年级上学期数学期中试卷(已下线)第27章相似01讲核心(已下线)第05讲 位似-【帮课堂】2022-2023学年九年级数学下册同步精品讲义(人教版)27.3位似课后作业C层
更新时间:2022-11-06 09:42:13
|
相似题推荐
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,直线
分别与x轴、y轴交于A、C两点,过点C作
,交x轴于点B.
![](https://img.xkw.com/dksih/QBM/2022/1/3/2893434830798848/2950029396819968/STEM/f1f71f7d-e1c6-4e29-8832-871d865168e2.png?resizew=461)
(1)直接写出点A的坐标;
(2)若点
在第二象限,且在直线
上方.
①连结
、
,设线段
、
交于点E,
的面积为
,
的面积为
,求
的最大值;
②如图2,过点A作
,交
延长线于点P,若
,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373e940578737a54a51be72e53a31c36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d900531973c546625694146fa1509ab9.png)
![](https://img.xkw.com/dksih/QBM/2022/1/3/2893434830798848/2950029396819968/STEM/f1f71f7d-e1c6-4e29-8832-871d865168e2.png?resizew=461)
(1)直接写出点A的坐标;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa828973e184f653c5b4df0ab0bbf8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
①连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
②如图2,过点A作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/612523cd1b322484bfd8eb676fa57e72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/599b5d3383829b619330e6c5e5021fcd.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,直线
与
轴交于点
,与
轴交于点
,点
是
轴正半轴上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/0d52bd2b-203d-4ba0-94a3-e73765e52567.png?resizew=189)
(1)直接写出点
的坐标为________,直线
的解析式为________;
(2)设点
在直线
上,点
在
轴上,连接
,以
为边向
右侧作正方形
.
①在
点的运动过程中,当顶点
落在直线
上时,求点
的坐标;
②点
从
点运动到
点的过程中,正方形
的对角线交点
运动的路径长为________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54457c0fa54fcd53474f8a14041e8fa9.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/d053b14c8588eee2acbbe44fc37a6886.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b51cd60e40e12cff26fa1f519aa42b0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/0d52bd2b-203d-4ba0-94a3-e73765e52567.png?resizew=189)
(1)直接写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50b433f97d2cde3a5c83eb7e6df291b.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
①在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.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,一次函数
的图象交反比例函数
的图象于
,
两点.
(2)点
是
轴上一点,若
,求点
的坐标;
(3)若
是以
为斜边的直角三角形,点
是
的中点,点
的坐标为
,求线段
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e146d35370a55195a9a14c623c74ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14f8297bca75733768012232c0780311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b73ca1ba35a96b78524f7ed2aae411.png)
(2)点
![](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/453eea9677fa0682598185161b729e1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eaceb8d6c6927e14d9ac7a557a2b11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af464ddb07308be2cd6f02e61fd08eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f5afd044be1fefe386cdd1ab253456.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】图1是某简易座椅,图2是其侧面示意图,固定点O为椅腿
和
的中点,靠背
的一端固定在
上的点E处,将
绕点E顺时针旋转180°后与
重合,此时靠背收拢.已知
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/2/712711af-cb1a-4008-8c36-d3f1d319bb94.png?resizew=240)
(1)求坐垫
的长.
(2)在收拢靠背的过程中,求点F到点C距离的最小值.(结果精确到
;参考数据:
,
,
,
,
)
![](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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b573efff9b671258ede586f71d0345c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178ba70b0388443d3ecde84e7a7b3d8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25d408eeec13726aa117dcb1b04c60fc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/2/712711af-cb1a-4008-8c36-d3f1d319bb94.png?resizew=240)
(1)求坐垫
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)在收拢靠背的过程中,求点F到点C距离的最小值.(结果精确到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048b61a5fb5f420c6d7de88db5bc3aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9450c05228aec381693237c56f1b41fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af3c04e0e7ffa02c15f1851db5dbd25a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d0062f4f00732a0cf11d1ac145c218b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab9ef8b634c2a582a9b1fb20fdd3a0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70053aeee507107b107885b5392c2d30.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】在平面直角坐标系中已知抛物线
经过点
和点
,点
为抛物线的顶点.
(1)求抛物线
的表达式及点
的坐标;
(2)将抛物线
关于点
对称后的抛物线记作
,抛物线
的顶点记作点
,求抛物线
的表达式及点
的坐标;
(3)是否在
轴上存在一点
,在抛物线
上存在一点
,使
为顶点的四边形是平行四边形?若存在,请求出
点坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e10437a8a3cabd85f405bebfc7d2f9d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ff2dba976c68740bbff0d1dda6a870c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c03447a29ec18a9dd8bd3ff6516a31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)是否在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e8c1ef22db302fea2aa5771fa018cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
【推荐2】综合与实践
[动手操作]任意一个四边形
通过剪裁,都可以拼接成一个三角形,方法如下:如图1,E,F,G,H分别是边
,
,
,
的中点,连接
,P是线段
的中点,连接
,
,沿线段
,
,
剪开,将四边形
分成①,②,③,④四部分,按如图2所示的方式即可拼成一个无缝隙也不重叠的
.
关于在拼接过程中用到的图形的变换,说法正确的是( )
A.①→①是轴对称B.②→②是平移
C.③→③是中心对称D.④→④是中心对称
[性质探究]如图3,连接
,
,
,判断四边形
的形状,并说明理由.
[综合运用]若
是一个边长为4的等边三角形,则四边形
的对角线
的最小值为__________.
[动手操作]任意一个四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d06177a597dd24f7c94f6ce775b2d2.png)
关于在拼接过程中用到的图形的变换,说法正确的是( )
A.①→①是轴对称B.②→②是平移
C.③→③是中心对称D.④→④是中心对称
[性质探究]如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3184cd468586362043f15d3964991725.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53b44617f5b4845321620a65260dc32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaebc9408ba1baf77c436b68a0dacce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d6a60cdd5ef7ddb20e860cf1c48ca67.png)
[综合运用]若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d06177a597dd24f7c94f6ce775b2d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d6a60cdd5ef7ddb20e860cf1c48ca67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aff046445f1f011dfe90ee951184525d.png)
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586372046823424/2588016855040000/STEM/26b023f9-3aef-42f3-9ff7-0815a580245b.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
真题
名校
【推荐1】如图,在平面直角坐标系
中,直线
与y轴交于点A,与反比例函数
的图象的一个交点为
,过点B作AB的垂线l.
(2)若点C在直线l上,且
的面积为5,求点C的坐标;
(3)P是直线l上一点,连接PA,以P为位似中心画
,使它与
位似,相似比为m.若点D,E恰好都落在反比例函数图象上,求点P的坐标及m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1882d2f789de61b5b7e3ec952e13b99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/126bc32b72447e06b043c6f159948387.png)
(2)若点C在直线l上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)P是直线l上一点,连接PA,以P为位似中心画
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.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,点
在平面直角坐标系中,小明给了一些m的取值,列出了如表:
(1)求该抛物线相应的函数表达式,并说明:无论m取何实数值,点M都在此抛物线上;
(2)将抛物线向右平移n(
)个单位得到新的抛物线,设
是新函数的图象与x轴的一个公共点.当
时,结合函数的图象,直接写出n的取值范围;
(3)设(1)中的抛物线与x轴的交点分别为点B、C(点B在点C的左侧),点D在该抛物线的对称轴上,
是
以点D为位似中心的位似图形(点A、B、C的对应点分别是点P、Q、M).若
与
的相似比是
,求m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b218a935de4fa6a544bf5c38e7c58b.png)
m | … | 0 | 1 | … | ||
… | 0 | … | ||||
… | 2 | 3 | 2 | … |
(1)求该抛物线相应的函数表达式,并说明:无论m取何实数值,点M都在此抛物线上;
(2)将抛物线向右平移n(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eff035ca131c306d37e6c17cc72dc781.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c475bf48d5b5037275831f005febc4ec.png)
(3)设(1)中的抛物线与x轴的交点分别为点B、C(点B在点C的左侧),点D在该抛物线的对称轴上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99675fa03da205c4499967c9d908412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99675fa03da205c4499967c9d908412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db20862b954cd1886f4765657a46d91c.png)
您最近一年使用:0次