1 . 如图,一张矩形纸片被分成四块面积相同的部分,己知
,
,则矩形纸片的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/712d3172-f452-4bab-95cc-a5ef8dcff5c8.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b929269c53a44907dba8ee298a0a522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7316a656313771a5dd28285076037a2a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/712d3172-f452-4bab-95cc-a5ef8dcff5c8.png?resizew=163)
A.13 | B.15 | C.18 | D.20 |
您最近一年使用:0次
2 . 如图,点A,B是反比例函数
图像上两点,且A,B关于原点O中心对称,
是等腰三角形,底边
轴,过点C作
轴交双曲线于点D,若
,则k的值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/661897ea-aec2-4c09-97ce-23e99bef6965.png?resizew=162)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cbea3f964b81d5077a4db9c4de1fa00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2634263d383b0487281fdcf6fe3cc625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d85fa76d93eb74a955bafbc01a2e456.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/661897ea-aec2-4c09-97ce-23e99bef6965.png?resizew=162)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 如图,
为以
为直径的
上一点,
和过点
的切线互相垂直,垂足为点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/c0ae45c0-d186-4d03-bdb2-61d26c7695b3.png?resizew=162)
(1)求证:
平分
;
(2)过点
作线段
的垂线
,垂足为点
(尺规作图,保留作图痕迹,不写作法)
(3)若
,求垂线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/c0ae45c0-d186-4d03-bdb2-61d26c7695b3.png?resizew=162)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c715756dfc6d38d80aba6503ac107572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
您最近一年使用:0次
4 . 某市规定了每月用水18立方米以内(含18立方米)和用水18立方米以上两种不同的收费标准.该市的用户每月应交水费y(元)是用水量x(立方米)的函数,其图象如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/8372efa9-dc56-4148-ba92-d6051cd546bd.png?resizew=177)
(1)若某月用水量为18立方米,则应交水费多少元?
(2)求当
时,
关于
的函数表达式,若小敏家某月交水费81元,则这个月用水量为多少立方米?
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/8372efa9-dc56-4148-ba92-d6051cd546bd.png?resizew=177)
(1)若某月用水量为18立方米,则应交水费多少元?
(2)求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2047388e470660d8a4a17125edb048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
5 . 问题解决:如图1,在矩形
中,点E,F分别在
边上,
于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/e73c860e-beb7-4eaa-afd5-3720f5dc1bb8.png?resizew=322)
(1)求证:四边形
是正方形;
(2)延长
到点H,使得
,判断
的形状,并说明理由;
(3)类比迁移:如图2,在菱形
中,点
分别在
边上,
与
相交于点
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e654d1f519b8ccaa238896f4dc930e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/e73c860e-beb7-4eaa-afd5-3720f5dc1bb8.png?resizew=322)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32262ab7eeb1ed0e0a8b08817f6b0628.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03a706b08c69fe2daf2e7cc8652d4902.png)
(3)类比迁移:如图2,在菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a10eb240081fd5b50cca76f72c4b6d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次
6 . 已知
是抛物线
上的两点,且
.(O为原点)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/08d6ecfb-ff58-48d8-8d0c-d9c6c7370f33.png?resizew=165)
(1)求
两点的横坐标之积和纵坐标之积;
(2)间直线
是否恒过定点,若是,求出定点坐标,并说明理由.
(3)求
面积的最小值;
(4)若抛物线上有一点
,将
改为
,直线AB是否恒过定点?若是,直接写出定点坐标,不必说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48f28aeccf369df5980ac787e9e313f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/08d6ecfb-ff58-48d8-8d0c-d9c6c7370f33.png?resizew=165)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(2)间直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
(4)若抛物线上有一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a73b6c3a1e416f084ba1e4b13166f742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45224f7eac9d0cef64bf28d93e7721a4.png)
您最近一年使用:0次
7 . 在平面直角坐标系中,己知函数
,
(
,
为常数,且
).
(1)判断函数
图象与
轴的交点个数,并说明理由;
(2)若
经过
,
两点中的其中一个点,求该函数的表达式;
(3)当
时,总有
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4620203fdccadb41f85ed96589291ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a743f4f4c17edc62ce7590927c97ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/539f2f683c350a03ca97543c36a24f51.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf8f5d8be251bf2848d6d10aa0340f9.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cafe647840cc2ace0d94bdca3c4fb03d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72850427e83ff19a24305783e080b280.png)
您最近一年使用:0次
8 . 对于二次函数
和
,其自变量和函数值的两组对应值如表所示(其中
、
均不为0,
),根据二次函数图象的相关性质可知:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
___________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf5c1d124e8e023fe8e8c5ef3412813.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf210c8c9e83e70f2d3ede1e18a5f3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfbd31f6ff17ca9dbe0ad498d3c5e28d.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/f940e491269e04ab4680ee10714ba88c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf5c1d124e8e023fe8e8c5ef3412813.png)
1 | ||
1 | 1 | |
您最近一年使用:0次
9 . 某旅行团入住杭州某酒店,有二人间,三人间种房型供选择,二人间
元
晚,三人间房
元
晚,已知18人入住二人间,30人入住三人间,当晚共花费3000元,可列方程( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4333bb203d02814c146ed587b69ea69d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4333bb203d02814c146ed587b69ea69d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
10 . 两个定值电阻
,
和它们并联后的总电阻
存在以下数量关系:
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efc18a5bb2e53586331b2a58538a48b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f20f21a9d50b61dac519a3ddab539d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf866fdcc4ea67bc8ff8bc8ddf1f9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06bed567719a1674f66a9ad9efa2c032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8225d0531fba46cbb4a3af4dd2d6751f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次