如图,已知抛物线C:y=x2-3x+m,直线l:y=kx(k>0),当k=1时,抛物线C与直线l只有一个公共点.
(1)求m的值;
(2)若直线l与抛物线C交于不同的两点A,B,直线l与直线l1:y=-3x+b交于点P,且
+
=
,求b的值;
(3)在(2)的条件下,设直线l1与y轴交于点Q,问:是否存在实数k使S△APQ=S△BPQ,若存在,求k的值;若不存在,说明理由.
(1)求m的值;
(2)若直线l与抛物线C交于不同的两点A,B,直线l与直线l1:y=-3x+b交于点P,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6082772658f14398449cdac79e462f53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a653a7a66eda9048d64cf59f8e73f6ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490d4349ac44ed95da6824b0f8bdbc68.png)
(3)在(2)的条件下,设直线l1与y轴交于点Q,问:是否存在实数k使S△APQ=S△BPQ,若存在,求k的值;若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/20/958aedc5-b282-4aa5-9216-0c7939bad78f.png?resizew=220)
2017九年级·福建泉州·专题练习 查看更多[3]
更新时间:2017-07-26 07:17:37
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】若一元二次方程
有两个实数根
,
,那么
,
,这一结论称为一元二次方程根与系数关系,它的应用很多,请完成下列各题:
(1)已知a、b是方程
的两根,求
的值.
(2)结合二元一次方程组的相关知识,解决问题:已知
和
是关于x,y的方程组
的两个不相等的实数解.问:是否存在实数k,使得
?若存在,求出该式的k值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/807d62d0b5623b3bd3cb285560bf8436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f05dd02b6f561dcf94bab8a3160108d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/897630dd340ec6c6b20cdd754d0a12c9.png)
(1)已知a、b是方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb081c72974cb58c3d963ab53804f1cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708929b0c4f51df55db33092d887a926.png)
(2)结合二元一次方程组的相关知识,解决问题:已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3396ead2a01ebd1d6134732541008a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734a03b0e1c4de970668548ebb944fc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e31494f80cca80b471fd98496285eca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32709bdf008bdd31ab4433cfdd0b13d9.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知关于
的方程
.如果方程有两个实数根
,
,当
时,求出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4899b4d821123f4be9ec0a2d9ebbc7f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fd5acb2365db2582ac413b9c7ec652d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】抛物线
的图象如图所示,根据图象填空.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/60a46677-8978-4d5f-90b6-d4bf1e2f1bfb.png?resizew=215)
(1)
时,y随x的增大而______;
(2)方程
的根是______;
(3)
时y的取值范围是______;
(4)若方程
没有实数根,k的取值范围是______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/60a46677-8978-4d5f-90b6-d4bf1e2f1bfb.png?resizew=215)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ccaa6e503b61e9ae78d8439cba2e328.png)
(2)方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b94f151c00959a1cd3946e7f8405337.png)
(4)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f841f974c8df40f0685f5a35f43c35d.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知关于
的一元二次方程
,其中
为常数.
(1)求证:无论
为何值,方程总有两个不相等实数根.
(2)已知函数
的图象不经过第三象限,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16bb837e1d4d36606bdaf1483c59f81a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(1)求证:无论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc3224b4bd6b03a9f701af5bb9a8c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,PA,PB是⊙O的切线,A,B是切点,AC是直径.
![](https://img.xkw.com/dksih/QBM/2022/1/11/2899437426393088/2973477516468224/STEM/64af1c29-0ff3-47d5-ab94-9bdfc0594688.png?resizew=190)
(1)连接BC,OP,求证:
;
(2)若OP与AB交于点D,
,AD=2,求直径AC的长.
![](https://img.xkw.com/dksih/QBM/2022/1/11/2899437426393088/2973477516468224/STEM/64af1c29-0ff3-47d5-ab94-9bdfc0594688.png?resizew=190)
(1)连接BC,OP,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a4de328c0f0fbc704db4b4f7490ebe.png)
(2)若OP与AB交于点D,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed9ce9be349f4eeaa78dc90bb45c580e.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,
是
的直径,点
在
上,
平分
,
是
的切线,
与
相交于点
,与
相交于点
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/6c312ed6-d16c-472e-a90d-6572b9ebc154.png?resizew=149)
(1)求证:
;
(2)若
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c302ea267dca9ec426847311571022d7.png)
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b44fa421d3ab01eee0d360a503bd212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/6c312ed6-d16c-472e-a90d-6572b9ebc154.png?resizew=149)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a8898b35398cbab065e5b0477255859.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52423e252340d1fb40096c726db184e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c302ea267dca9ec426847311571022d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知抛物线
与直线
交于A,B两点(点A在点B右侧).
(1)求A,B两点的坐标;
(2)若动点P在A,B之间的抛物线上运动(不与点A,B重合),连接
,
,求当
的面积最大时,点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041cfa6ab15f819ab703fb3345c7a9d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
(1)求A,B两点的坐标;
(2)若动点P在A,B之间的抛物线上运动(不与点A,B重合),连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
真题
【推荐2】如图所示,在平面直角坐标系
中,四边形
为正方形,其中点A、C分别在x轴负半轴,y轴负半轴上,点B在第三象限内,点
,点
在函数
的图像上
(2)连接
,记
的面积为S,设
,求T的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b5634528ca133fee203004bbc4789fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530e5817131adf2c05b99ff18eb9060f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd17a2251aa900b821baec9abdc8d5c.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79f6bec0d2dab9b9efedfe86d1159b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357265c532428e886a643e8e653eec9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeafa1a2d98f27804d276aa4a16f06c1.png)
您最近一年使用:0次