题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065944-75034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065944-13718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065944-70721.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065944-65317.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065945-68769.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065945-89168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065944-75034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065945-16895.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065944-70721.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065944-65317.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065945-66307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065944-13718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065946-89207.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065946-45832.png)
(1) 填空:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065946-61978.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065946-12913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065946-89207.png)
(2)设抛物线与
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065946-89696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-24594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065944-75034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-75325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065946-89696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-10472.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065944-75034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-24594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-62506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-24594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-62506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065946-89207.png)
(3)在(2)的条件下,若
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-62772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065948-16834.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065948-52997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065948-36240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065948-95071.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-75325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065949-55884.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065948-36240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065949-26304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065948-52997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065949-93643.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065949-41744.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065950-76747.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065950-79199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-24594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-62506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065946-89207.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065950-52658.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065950-26457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065949-26304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065948-52997.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065949-41744.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065950-76747.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065950-79199.png)
(2)过
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-62506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065950-95653.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-75325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065951-27692.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065951-30175.png)
则有
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065951-66375.png)
由题意可知,
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065951-83009.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065952-88945.png)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-75325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065946-89696.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065952-55543.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065952-89905.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065952-55252.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065952-44751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065953-35738.png)
(注:本式也可由
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065953-17231.png)
设点
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-62506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065953-47664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065953-25434.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065954-31825.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065954-22990.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065954-25907.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065954-84332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065955-75762.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065955-32742.png)
∴点
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-62506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065955-37330.png)
又设直线
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065955-12003.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065955-27813.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065956-83214.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065956-28308.png)
∴直线
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065955-12003.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065956-21457.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065956-24959.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065956-95056.png)
∴点
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-62506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065955-12003.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-24594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-62506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065946-89207.png)
(3)存在.
由勾股定理可得:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065957-90657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065957-67617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065957-21513.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065957-86311.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065958-85310.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065958-41689.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065958-52687.png)
又∵
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-62772.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065958-68320.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065959-30635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065959-98230.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065959-58225.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065959-75887.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065959-42982.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019070000-83964.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019070000-83119.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019070000-80647.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019070000-99399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019070001-14945.png)
综上所述,当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065950-52658.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065950-26457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065949-26304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065948-52997.png)
(1)根据二次函数图象的对称性以及等腰直角三角形的性质求出点A的坐标,然后代入函数解析式,计算即可求得值;
(2)过
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-62506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065950-95653.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-75325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065951-27692.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065952-55252.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065952-44751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065953-35738.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-62506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065953-47664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065947-62506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065955-12003.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065956-24959.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065955-12003.png)
(3)由勾股定理可得:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065957-90657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065957-67617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065957-21513.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065957-86311.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065959-75887.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065949-93643.png)
核心考点
试题【把一块三角板置于平面直角坐标系中,三角板的直角顶点为,两直角边与轴交于、,如图1,测得,.以为顶点的抛物线恰好经过、两点,抛物线的对称轴与轴交于点.(1) 填空】;主要考察你对二次函数定义等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065939-12169.png)
(1)求y1关于x的函数关系式。
(2)求出W关于x的函数关系式。
(3)商场经理如何采购,如何定价,才能使每月获得的总利润W最大?说明理由。
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065932-68255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065932-57051.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065932-68255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065932-24019.png)
小题1:求抛物线
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065932-68255.png)
小题2:已知实数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065932-56484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065932-89775.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065932-77251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065932-59536.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065932-58767.png)
小题3:若抛物线先向上平移4个单位,再向左平移1个单位后得到抛物线
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065932-38559.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065933-90815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065933-56668.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065933-39335.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065933-12611.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065933-12611.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065933-12611.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065933-78374.png)
(参考公式:在平面直角坐标系中,若
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065934-33795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065934-97423.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065934-45603.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065934-39454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065927-50493.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065928-39528.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065927-50493.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065928-42116.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065917-61071.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065917-48654.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065918-22531.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065918-54760.png)
![]() | … | ![]() | ![]() | ![]() | 1 | 2 | 3 | 4 | … |
![]() | … | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | … |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065920-85668.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065920-21680.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065920-64785.png)
A.
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065920-69380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065921-69179.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065921-16278.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065921-36840.png)
C.
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065921-94555.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065921-36840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065921-16278.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065921-67789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065909-62469.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065909-24800.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065910-22657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065910-83518.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065910-94612.png)
小题1:若
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065910-71433.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065910-91634.png)
小题2:若实数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065911-46459.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065911-13430.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019065911-77350.png)
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- 3She is a beautiful red-haired girl. she has been shopping wi
- 42009年12月21日,工业和信息化部部长李毅中说:“今年是进入新世纪以来我国经济社会发展最为困难的一年。但是,采取了一
- 5阅读宋词《水调歌头•明月几时有》,完成10-11题。(4分)水调歌头·明月几时有丙辰中秋,欢饮达旦,大醉,作此篇,兼怀子
- 6The young man was glad that his experience as a cook in the
- 7Barack Obama, a black man, is the president of the United St
- 8函数f(x)=x3-ax2-bx+a2,在x=1时有极值10,则a、b的值为( )A.a=3,b=-3或a=―4,b
- 9读右图,完成下列问题。(8分)(1)字母A、B、C、D代表我国四大干湿地区,其中A代表 地区,B代表 地区
- 10从社会转型的角度看,英国《权利法案》的颁布表明 [ ]A、 国王受法律约束,只能依法办事 B、 国王