如图,已知抛物线
的对称轴为
,且其与x轴的一个交点坐标为
,其部分图象如图所示,下列结论:①
;②
;③方程
的两个根是
,
;④
;⑤当
时,y随x的增大而增大;⑥抛物线上有三点
,
,
,则
.其中正确的结论有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ed24bfcc37b79fe9ca61ed8fdf26ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4630bb948780be53bc73d9ddef875000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b6ab454199d2738ea1b5cefb133d50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c7b380d82f311ec47be64bbd9fd32e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd2336e50c0afb3e8e73a6ea9070ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2368b2d5bf5fc67c771adb2b06d498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3c6395a297b16b3eac706f57634a1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee56163232787c5afd580af7bc2f9e48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a26da549dca626a5be6dbf1c871123.png)
A.2个 | B.3个 | C.4个 | D.5个 |
更新时间:2022-07-24 20:13:01
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】若点A(3,y1),B(0,y2),C(﹣2,y3)在抛物线y=x2﹣4x+k上,则y1,y2,y3的大小关系是( )
A.y2>y3>y1 | B.y2>y1>y3 | C.y3>y2>y1 | D.y1>y2>y3 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】已知点A(﹣1,﹣1),点B(1,1),若抛物线y=x2﹣ax+a+1与线段AB有两个不同的交点(包含线段AB端点),则实数a的取值范围是( )
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】若二次函数
的图象的顶点在第一象限,且过点
和
,则
的值的变化范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d06d31c9a2298b02664a86ddd91b1121.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d1b0e316f658f4ffe056511101614d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc2c355e5107068d61eee7d23fdd855.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】抛物线y1=ax2+bx+c与直线y2=mx+n的图象如图所示,下列判断中:①abc<0;②a+b+c>0;③5a-c=0;④当x<
或x>6时,y1>y2,其中正确的个数有( )
![](https://img.xkw.com/dksih/QBM/2017/4/7/1660613714452480/1661351335141376/STEM/87382831910a4b7995f78b8be6fe960e.png?resizew=11)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/aea5fd47-fd3d-4b7a-b1c9-cace1e525365.png?resizew=149)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】如图是二次函数
的图象的一部分,给出下列命题,其中正确的命题是( )(1)
;(2)
;(3)
的两根分别-3和1;(4)
;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/024e8927-fd5a-46a1-81fe-8b0c5f57c419.png?resizew=122)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e56f4504e0f80fd031c8b5f41832e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3670c603c5bc8f8b0d0858170c269ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b04816afb09658425297a9820dd4e16.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/024e8927-fd5a-46a1-81fe-8b0c5f57c419.png?resizew=122)
A.(1)(2) | B.(2)(3) | C.(1)(3) | D.(1)(3)(4) |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】已知二次函数
的图象与
轴的一个交点坐标为
,对称轴为直线
,下列结论中;①
;②若点
均在该二次函数图象上,则
;③若
为任意实数,则
;④方程
的两实数根为
,且
,则
.正确结论的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df7fcf82e3fac415783957d0f17448f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f08d790198bbf6e6f5e8ef2cca00b10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/159aa1bf3c29e48388097b7dabb525cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b44c63a912c9f07b80fb8f5bdde7a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9307ec4cfa026ff884e085d6be546cb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d416af31216daffaed84c4d565b948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee88d2991f70d0ca4207e31c9b165e84.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】已知二次函数
,函数y与自变量x的部分对应值如下表,
根据表格中的信息,得到如下结论:
①二次函数
的图象开口向上;
②求该二次函数的表达式时,可设
;
③关于x的一元二次方程
的两个根为0或2;
④若
,则
.
以上结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | |
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
①二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
②求该二次函数的表达式时,可设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0272d5e6c5be808a65515dd5c40b6725.png)
③关于x的一元二次方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67fe05e2c68ec86d50068e04191a330c.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241cf97a1aa2d6ed054ef82c1b5d369e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b843858ba23012c724dea0c51d54a3.png)
以上结论正确的是( )
A.①③ | B.②③ | C.②④ | D.③④ |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】已知抛物线
经过
,
,
三点,则
,
,
的大小关系是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31271fa6a6571da3f5e4cdf80bcbbb07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f445dad5a6c303bf75555ef44f4af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/179f5926c0289862d9b2d932bcb7154e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d60947fa9b15eca97a4c42e3bc1081f.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)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次