二次函数
(a,b,c为常数,且
).
(1)若二次函数解析式为
,此函数图像经过
、
,且
,则
______,
______;(找出一组符合条件的
、
的值即可)
(2)若
,函数图像经过
、
、
,请直接写出
、
、
的大小关系(用“<”连接);
(3)若
,函数图像经过
、
、
,且
,当
,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
(1)若二次函数解析式为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57fec8a77d00c7ceb55311eb1f149055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2dd24e24da821ff3aa93610d280ac7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e94eb54fb3b279c72e33e201f481da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7091d529281abff275ef19b9197445a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e92f14fb20f920f88dcad2ccd1d53f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15dad5a12f34bed0da0de93beae0eaa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92fe5d86b583bba4a8910fb0d41df8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf43761332b2235d9f94b0433bc5634.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b51d6d1ac5c1c496d0b1ecf0468e8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07281bc2bd5f52eee7ad1828b775ca42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9314bd1d7a6e070f4f2428f9a321804e.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/325dd2bf9fc052aa5574be903e0255a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3999dccfda14e5490c27ebb7a8abcd30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52876d7ddfcd341529efad285ad3bb85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03bc9d541717f9ac10fd2d150d799e0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0770b05b44defcd257f2b70fab5bf2f6.png)
更新时间:2022-05-04 06:01:14
|
相似题推荐
解答题-问答题
|
较难
(0.4)
解题方法
【推荐1】如图1,抛物线
与
轴交于
两点,与
轴交于点
,其中点
的坐标为
,抛物线的对称轴是直线
.
![](https://img.xkw.com/dksih/QBM/2022/4/24/2964922063970304/2967808205946880/STEM/c77b7fc9-ed6a-4065-b583-c557ae99d2aa.png?resizew=383)
(1)求抛物线的解析式;
(2)若点
是直线
下方的抛物线上一个动点,是否存在点
使四边形
的面积为16,若存在,求出点
的坐标若不存在,请说明理由;
(3)如图2,过点
作
交抛物线的对称轴于点
,以点
为圆心,2为半径作
,点
为
上的一个动点,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b286a72a818ccc52e63581841da08dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](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/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d599059e6b2c918ab15ee22611b6962.png)
![](https://img.xkw.com/dksih/QBM/2022/4/24/2964922063970304/2967808205946880/STEM/c77b7fc9-ed6a-4065-b583-c557ae99d2aa.png?resizew=383)
(1)求抛物线的解析式;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76981622e3684aca12435743b6a08a8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图2,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86afd4f2661a9208c4e600e318408777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669e8dfb2b45e6f74d86408343a18fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669e8dfb2b45e6f74d86408343a18fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863fbcf8ff641e6376717187dcbc6dea.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】已知抛物线:
:
经过点在
,
,与y轴的交点为C.关于原点对称的抛物线为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6eaa137a2290a9a9ec7ad635d17dbb6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/09c849b1-ffab-46c0-bdf4-3240554c8f70.png?resizew=305)
(1)求抛物线
的函数表达式;
(2)点A在
的对应点为M,若点P是抛物线
上一点,过点P作x轴的垂线,垂足为Q,若
相似,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3ff0b0fea1cb642d3f6be77a1ff32f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b286a72a818ccc52e63581841da08dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6eaa137a2290a9a9ec7ad635d17dbb6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/09c849b1-ffab-46c0-bdf4-3240554c8f70.png?resizew=305)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6eaa137a2290a9a9ec7ad635d17dbb6.png)
(2)点A在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6eaa137a2290a9a9ec7ad635d17dbb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6eaa137a2290a9a9ec7ad635d17dbb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4a145c9eca8c0fa021d2019b3a4382.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】设函数
和
的图象相交于点
,函数
的图象的顶点分别为
和
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/134e66c4-40e1-40d7-aec5-a8615b11627b.png?resizew=202)
(1)画出当
时,函数
在直角坐标系中图象;
(2)观察(1)中所画函数图象的顶点位置,发现它们均分布在某个函数的图象上,请写出这个函数的表达式,并说明理由;
(3)设
,求证:
是与
无关的常数,并求
的最小值;
(4)设直线
的图象分别与函数
的图象交于
和
,
.若
,写出所有实数
.(直接写出
的值即可,不要求写理由)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a7258b409beb61b9701fb9f9d58398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7554ba1d32e4b09bfffaf3692d9a74d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7404d4aa0f0bcfe7ebf45d3eeab3cdb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/134e66c4-40e1-40d7-aec5-a8615b11627b.png?resizew=202)
(1)画出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b639b739c98e7c9f626d2854bdb260ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7404d4aa0f0bcfe7ebf45d3eeab3cdb6.png)
(2)观察(1)中所画函数图象的顶点位置,发现它们均分布在某个函数的图象上,请写出这个函数的表达式,并说明理由;
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f109ad046f362d8686c7ef9810c568.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(4)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19154d71383328a57153a293beb1faec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7404d4aa0f0bcfe7ebf45d3eeab3cdb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b9e291c2bd91bd4489598e7b0b746d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.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
|
较难
(0.4)
【推荐2】已知抛物线y=2x2+4x+k﹣1(k为大于2的正整数)与x轴有交点.
(1)求k的值及抛物线y=2x2+4x+k﹣1的对称轴;
(2)将抛物线y=2x2+4x+k﹣1在直线y=2上方的部分沿直线y=2翻折,其余部分不变,得到一个新图象,当直线y=
x+b与此图象有两个公共点时,求b的取值范围.
(1)求k的值及抛物线y=2x2+4x+k﹣1的对称轴;
(2)将抛物线y=2x2+4x+k﹣1在直线y=2上方的部分沿直线y=2翻折,其余部分不变,得到一个新图象,当直线y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2020/5/2/2454045562478592/2456216496644096/STEM/15314c7ce84d4843b82e2889ca067049.png?resizew=191)
您最近一年使用:0次