已知抛物线
和直线
.
(1)求抛物线
与
轴的交点坐标;
(2)证明抛物线
顶点在直线
的下方;
(3)经过点
,其中
,且平行于
轴的直线
交
轴于点
,将抛物线
绕点
旋转
得到抛物线
,如果抛物线
截直线
所得的线段
的长为定值,求
和
之间的数量关系以及线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171b8105d8109a483fbd8e629c72c815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e91a5c55afc9ffeb74e9d19e93462dd.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)证明抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
(3)经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51ef9cd1383692bc038e47d87cf0c0f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7bc212939134e366e29e7e2e5d6255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.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/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e1dcdc9d50fe147e3924ce30bba519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
更新时间:2023-07-22 09:33:02
|
相似题推荐
解答题-问答题
|
困难
(0.15)
名校
【推荐1】已知:在平面直角坐标系中,直线
分别交
轴负半轴、
轴于点
、
,且
.
(1)如图1,求直线
的解析式;
(2)如图2,点
为点
关于
轴的对称点,点
是
的内部一点,四边形
为平行四边形,且点
在线段
的延长线上,求
的正切值;
(3)如图3,在(2)的条件下,若
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bee4f5212727502b36fbfbc5590b85.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/1/38929109-1260-493e-8842-efd8c60fb9c7.jpg?resizew=527)
(1)如图1,求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adfe2a58326612fcabd34fd4402a66ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
(3)如图3,在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b40ccc09811639574027901119e6a153.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
|
困难
(0.15)
名校
【推荐2】如图,已知:抛物线
经过点
、点
,且交
轴于另一点
.
(1)求抛物线的解析式;
(2)在直线
上方的抛物线上有一点
,求
面积的最大值及此时点
的坐标;
(3)
点坐标为(2)中的坐标,若抛物线的图像上存在点
,使
的面积等于
面积的一半,则
点的坐标为__________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f18269e4b2c08f69b719c4c7e7d71733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40630a669f4eedf626bc24851df10c85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d03310fa9440053c57d878acc06d02d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/22/54122d47-4905-462f-8b10-611d65be71e1.png?resizew=353)
(1)求抛物线的解析式;
(2)在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddb32a7a5c157fdf8aa049b2d665b4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)
![](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/147de24f071e316b68fd2e78e3c84545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddb32a7a5c157fdf8aa049b2d665b4c.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
|
困难
(0.15)
【推荐1】在平面直角坐标系中,我们将抛物线
通过平移后得到
,且设平移后所得抛物线的顶点依次为
,这些顶点均在格点上,我们将这些抛物线称为“缤纷抛物线”(k为整数).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/12/fda6466c-436f-4250-9bd8-685e78fa149a.png?resizew=305)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/12/b9af1777-a59b-4cd7-9928-4532fe38beeb.png?resizew=305)
(1)
的坐标为____________,直接写出平移后抛物线
的解析式为____________(用k表示);
(2)若平移后的抛物线
与抛物线
交于点A,对称轴与抛物线
交于点B,若
,求整数k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c57e815c01a412466a6aa12d3e883a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f375fb2381c0445f43de98beb57c1cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4006136df18d54596259ca6e80a1ce99.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/12/fda6466c-436f-4250-9bd8-685e78fa149a.png?resizew=305)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/12/b9af1777-a59b-4cd7-9928-4532fe38beeb.png?resizew=305)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63be95225b55df87368caaf221adf29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4741eb4c177d75ca74fe2d36e52ecbc.png)
(2)若平移后的抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4741eb4c177d75ca74fe2d36e52ecbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c57e815c01a412466a6aa12d3e883a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c57e815c01a412466a6aa12d3e883a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3858485455bc06eabe80768119b81c65.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐2】在抛物线y=ax2+bx+c(a≠0)中,规定:(1)符号[a,b,c]称为该抛物线的“抛物线系数”;(2)如果一条抛物线与x轴有两个交点,那么以抛物线的顶点和这两个交点为顶点的三角形称为这条抛物线的“抛物线三角形”.
完成下列问题:
(1)若一条抛物线的系数是[﹣1,0,m+1],则此抛物线的函数表达式为______(含参数m),当m满足______时,此抛物线没有“抛物线三角形”;
(2)若抛物线y=x2+bx的“抛物线三角形”是等腰直角三角形,求出该抛物线的“抛物线系数”;
(3)若一条抛物线的系数是[a,﹣4a,c](a<0)与x轴交于A、B两点(点A在点B的左侧),与y轴负半轴交于点C,顶点为D,已知S△ABD:S四边形ABCD=1:4,且tan∠ACB=
.求该抛物线的函数关系式.
完成下列问题:
(1)若一条抛物线的系数是[﹣1,0,m+1],则此抛物线的函数表达式为______(含参数m),当m满足______时,此抛物线没有“抛物线三角形”;
(2)若抛物线y=x2+bx的“抛物线三角形”是等腰直角三角形,求出该抛物线的“抛物线系数”;
(3)若一条抛物线的系数是[a,﹣4a,c](a<0)与x轴交于A、B两点(点A在点B的左侧),与y轴负半轴交于点C,顶点为D,已知S△ABD:S四边形ABCD=1:4,且tan∠ACB=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐3】已知点P是二次函数
图像的顶点.
![](https://img.xkw.com/dksih/QBM/2022/5/7/2974211045376000/2976328343871488/STEM/b177ea82-7e80-4dfb-a830-a575d3c9377b.png?resizew=284)
(1)小明发现,对m取不同的值时,点P的位置也不同,但是这些点都在某一个函数的图像上,请协助小明完成对这个函数的表达式的探究:
①将下表填写完整:
②描出表格中的五个点,猜想这些点在哪个函数的图像上?求出这个图像对应的函数表达式,并加以验证,
(2)若过点(0,2),且平行于x轴的直线与
的图像有两个交点A和B,与②中得到的函数的图像有两个交点C和D,当
时,直接写出m的值等于________;
(3)若
,点Q在二次函数
的图像上,横坐标为m,点E在②中得到的函数的图像上,当
时,求出E点的横坐标(用含m的代数式表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2da69721e751bd0cd6d54edd018dc316.png)
![](https://img.xkw.com/dksih/QBM/2022/5/7/2974211045376000/2976328343871488/STEM/b177ea82-7e80-4dfb-a830-a575d3c9377b.png?resizew=284)
(1)小明发现,对m取不同的值时,点P的位置也不同,但是这些点都在某一个函数的图像上,请协助小明完成对这个函数的表达式的探究:
①将下表填写完整:
m | -1 | 0 | 1 | 2 | 3 |
P点坐标 | ![]() | ![]() | _________ | ________ | ________ |
(2)若过点(0,2),且平行于x轴的直线与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2da69721e751bd0cd6d54edd018dc316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ac49ab7c8001c209b8611b9ea40d85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2da69721e751bd0cd6d54edd018dc316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc250adeb96d1a71e3171f7c857a2789.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐1】问题背景
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/b89f6c8b-700e-49c8-b15f-f20811cb0d57.png?resizew=542)
如图1,在等边
中,点
是等边
内一点,连结
,将
绕点
逆时针旋转
得到
, 连结
,则
是___________三角形;
尝试应用 如图2,在等腰
中,
,点
是
内一点,连结
,
,求
面积
拓展创新 如图3,在等腰
中,
,
为平面内一点,且
,则
的值为___________
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/b89f6c8b-700e-49c8-b15f-f20811cb0d57.png?resizew=542)
如图1,在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64b121b55aa0bd7fee7ac38eca90c067.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
尝试应用 如图2,在等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ff1dc90384c31780d24bc92b757c9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8593a9875a1e7cf4012d7bf872b5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0efa6ebced6fe5ccb06485b8accb5b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
拓展创新 如图3,在等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3613fa43a055100f9162bf4ec665b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c3bbdaa6337ea4675e9709d60cb55e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c4539f13547281837ab2af8739c9786.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】在数学兴趣小组活动中,小明同学遇到了如下问题:
中,
,点
在其内部,
,
,
,求
的长;
经过同学们的观察、思考、交流,对上述问题形成了如下想法:将
绕点
按逆时针方向旋转
,得到
,连接
,探究
三边之间的数量关系,…根据以上分析过程
______.
(2)【类比分析】如图2,在等边
中,点
在其内部,且
,
,
.求
的度数.
(3)【拓展应用】①如图3,在
中,
,点
在其内部,
是等腰三角形,且
.若
,
,求
的长.
②如图4,在
中,
,
,点
为平面内一点,若
,
,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69014a4cda821d97f56d6f6a8313de3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87261df80b82221732329b6ef3fdda7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
经过同学们的观察、思考、交流,对上述问题形成了如下想法:将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a1eda00fc2d64ce3a42004b24adf00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92a463aaad04beefc2ed12d694d687f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d0f08eb47a5429245f4c162d0355a45.png)
(2)【类比分析】如图2,在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08aa6fd52f3933cbded9ce8c880b4a10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f82a30d6b232dc4d8f35d2d6e0e0f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
(3)【拓展应用】①如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39c7b0e15bfcf4bd7214320bc40f5373.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae16b72924eb24c45f5dcfab07cc01b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c20f08ca44f10e3f184fb0e9b2907921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②如图4,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9b9bb0f509e6f3d30858efb217c1f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f4cb33cdb3e2994ac7b9a0abbabed2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5033d9a2986cad7932b61d67c17de658.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐1】综合与探究
如图,抛物线y=a
经过点A、B、C且点C坐标为(0,−2).
(1)求出抛物线的解析式;
(2)在直线AC上方的抛物线上有一点D,使得△DCA的面积最大,求出点D的坐标.
(3)点H在线段AC上,若OH最短时,在x轴上找一点N,使△CHN周长最小时,求点N的坐标
(4)P是抛物线上一动点,过P作PM⊥x轴,垂足为M,是否存在P点,使得以A,P,M为顶点的三角形与△OAC相似?若存在,请求出符合条件的点P的坐标;若不存在,请说明理由.
如图,抛物线y=a
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/479fbc4acd0fa10e20145a71ce9a98d3.png)
(1)求出抛物线的解析式;
(2)在直线AC上方的抛物线上有一点D,使得△DCA的面积最大,求出点D的坐标.
(3)点H在线段AC上,若OH最短时,在x轴上找一点N,使△CHN周长最小时,求点N的坐标
(4)P是抛物线上一动点,过P作PM⊥x轴,垂足为M,是否存在P点,使得以A,P,M为顶点的三角形与△OAC相似?若存在,请求出符合条件的点P的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/6/2922ae58-fb21-4e9b-b674-0a297c468254.png?resizew=153)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】如图,在平面直角坐标系
中,半径为1的圆的圆心
在坐标原点,且与两坐标轴分别交于
、
、
、
四点,
点坐标为
.抛物线
与
轴交于点
,与直线
交于点
、
,且
、
分别与圆
相切于点
和点
.
(1)求抛物线的解析式.
(2)过点
作圆
的切线交
的延长线于点
,判断点
是否在抛物线上,说明理由.
(3)抛物线对称轴交
轴于点
,连接
并延长交
于点
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.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/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dafebaaf13781120dc57c277d0267c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/7/3ad0815f-4288-44e5-9d6b-031eb6876fa2.png?resizew=158)
(1)求抛物线的解析式.
(2)过点
![](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/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)抛物线对称轴交
![](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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
您最近一年使用:0次