如图,在平面直角坐标系中,将一块等腰直角三角板ABC放在第二象限,斜靠在两坐标轴上,点C坐标为(-1,0),
.一次函数
的图象经过点B、C,反比例函数
的图象经过点B.
![](https://img.xkw.com/dksih/QBM/2020/5/21/2467684749737984/2468331584815104/STEM/6eb16d17e6b148e9a8db44b138f377a5.png?resizew=163)
(1)一次函数关系式为、反比例函数的关系式为____;
(2)当x<0时,
的解集为_____;
(3)在
轴上找一点M,使得AM+BM的值最小,并求M的坐标和AM+BM的最小值.
(4)若x轴上有两点E、F,点E在点F的左边,且EF=1.当四边形ABEF周长最小时,请直接写出点E的横坐标为_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3768c4f2eaef441fb7bd98bd4a7a90d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05621b18b7ffc991d9f30380e2e08fea.png)
![](https://img.xkw.com/dksih/QBM/2020/5/21/2467684749737984/2468331584815104/STEM/6eb16d17e6b148e9a8db44b138f377a5.png?resizew=163)
(1)一次函数关系式为、反比例函数的关系式为____;
(2)当x<0时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e7a7aff4e7663a7e3228018a1db665.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(4)若x轴上有两点E、F,点E在点F的左边,且EF=1.当四边形ABEF周长最小时,请直接写出点E的横坐标为_____
19-20九年级下·江苏盐城·阶段练习 查看更多[2]
更新时间:2020-05-22 18:56:22
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相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,正方形
和正方形
的中心均与平面直角坐标系的原点
重合,边分别与坐标轴平行,且
,反比例函数
的图象在第二象限的部分与正方形
交于点
,且经过正方形
的顶点
,已知图中阴影部分的面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/9e68aa7a-2135-4cef-b758-dab106eb0660.png?resizew=179)
(1)求反比例函数的解析式;
(2)求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b99d168bb78d806661f617036145692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb69696a695cdb5e352d5dbbb7182b9a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/9e68aa7a-2135-4cef-b758-dab106eb0660.png?resizew=179)
(1)求反比例函数的解析式;
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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适中
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【推荐2】如图,在平面直角坐标系中,直线
与双曲线
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/7/86a6e057-ca07-45cd-ab99-8001af9b0502.png?resizew=228)
(1)求反比例函数的表达式;
(2)点
,连接
,把
沿
轴向右平移
上单位长度,对应得到
,当双曲线经过
一边的中点时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdaf3914f625c7535a8ddc019ff4cba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6ae81e7fe93c1834a61056b16843041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7260181cc30ac7f676e07f9af788e8fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/7/86a6e057-ca07-45cd-ab99-8001af9b0502.png?resizew=228)
(1)求反比例函数的表达式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0d02d76af11a2b8bfb7d6e1b3c171f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0d02d76af11a2b8bfb7d6e1b3c171f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-证明题
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【推荐1】如图,在平面直角坐标系中,直线
交y轴于点A,交x轴于点B,点C为线段OB的中点,作点C关于直线AB的对称点F,连接BF和OF,OF交AC于点E,交AB于点M.
![](https://img.xkw.com/dksih/QBM/2022/4/28/2967796863434752/2972333475651584/STEM/8532e22e-555d-4df9-942c-a1d4671633ed.png?resizew=195)
(1)求点F的坐标.(用m表示)
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b74381f68eb1e33d412a7a3d62313f.png)
![](https://img.xkw.com/dksih/QBM/2022/4/28/2967796863434752/2972333475651584/STEM/8532e22e-555d-4df9-942c-a1d4671633ed.png?resizew=195)
(1)求点F的坐标.(用m表示)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e99cd1610de98c8332da8c4520aad6e.png)
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解答题-作图题
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【推荐2】如图,△ABC的∠B=65°,∠C=90°.
![](https://img.xkw.com/dksih/QBM/2016/3/8/1573981863952384/1573981869817856/STEM/5a03b6c6175e43b293e1cb2e852d8627.png)
(1)在图中画出△ABC关于直线MN对称的△DFE,使点A与点D是对称点,点C与点E是对称点;
(2)请直接写出∠D的度数.
![](https://img.xkw.com/dksih/QBM/2016/3/8/1573981863952384/1573981869817856/STEM/5a03b6c6175e43b293e1cb2e852d8627.png)
(1)在图中画出△ABC关于直线MN对称的△DFE,使点A与点D是对称点,点C与点E是对称点;
(2)请直接写出∠D的度数.
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解答题-证明题
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适中
(0.65)
【推荐1】给出一个新定义:有两个等腰三角形,如果它们的顶角相等、顶角顶点互相重合且其中一个等腰三角形的一个底角顶点在另一个等腰三角形的底边上,那么这两个等腰三角形互为“友好三角形”.
和
互为“友好三角形”,点D是
边上一点(不与点B重合),
,
,
,连接
,则
________
(填“<”或“=”或“>”),
________°;
(2)如图②,
和
互为“友好三角形”,点D是
边上一点,
,
,
,M、N分别是底边
的中点,请探究
与
的数量关系,并说明理由;
(3)如图③,
和
互为“友好三角形”,点D是
边上一动点,
,
,
,M、N分别是底边
的中点,请直接写出
与
的数量关系(用含
的式子表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b753dbb5a670dd4f5e23bb919e44dda2.png)
(2)如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(3)如图③,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
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解答题-作图题
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适中
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名校
【推荐2】如图,已知边长为
的正方形
和
.
![](https://img.xkw.com/dksih/QBM/2023/4/28/3226085409439744/3227795616964608/STEM/5b56f8bda4724e89856cc1367ad3463e.png?resizew=358)
(1)以
为一个内角作菱形
,使
;(要求:尺规作图,不写作法,保留作图痕迹)
(2)这样画图得到菱形的依据是 .
(3)设正方形
的面积为
,菱形
的面积为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb0762ea78d24c573e55488646c0641.png)
![](https://img.xkw.com/dksih/QBM/2023/4/28/3226085409439744/3227795616964608/STEM/5b56f8bda4724e89856cc1367ad3463e.png?resizew=358)
(1)以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b97285f9b02878e22a071e97fdb3f8a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0402c7e8ed10c0d1c56c318fb58e69b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf155beaaf953299a0d54b4f18808c76.png)
(2)这样画图得到菱形的依据是 .
(3)设正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0402c7e8ed10c0d1c56c318fb58e69b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad5a9147b25285124851a61c7d1a24a.png)
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