下列关于抛物线
的说法中错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668ee9a91ebc342354c319153738f634.png)
A.顶点坐标是(1,3) | B.对称轴是直线![]() |
C.开口向下 | D.可由抛物线![]() |
更新时间:2020-02-27 18:20:16
|
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【推荐1】将抛物线
向上平移1个单位,平移后所得抛物线的表达式是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34668c97cc9be440ff36e62de4439318.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】平面直角坐标系中,点
在
轴上,以
为边向
轴下方作
,
,
,将抛物线
向上平移
(
为正整数)个单位,使平移后得到的抛物线顶点落在
内部(不包括
边界),若点
的坐标为
,则
的取值可能是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b352fa3e781df195ceccca90c3932a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adeda5c48e2f362c449841bc82731c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb1e91215d96f7c690838a32b9fd1f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4973081c80186bfd9bbe08cfc48eee0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f5c6806a03c66e0a9a16e46bfc09c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.3 | B.4 | C.5 | D.6 |
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【推荐1】对于抛物线
,下列结论:①抛物线的开口向下;②对称轴为直线x=1;③顶点坐标为(﹣1,3);④点A(
,
),B(
,
)在抛物线上,若
>
>0,则
<
.其中正确结论的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad8ab547bb246cd2e539e9bf3ba56ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.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/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
A.1 | B.2 | C.3 | D.4 |
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【推荐2】已知某二次函数上两点
,当
时,
;当
时,
,则该二次函数的解析式可以是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/631496cf12fbdd0c2d0429f174297afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89d08550cde3e34887cfe734fabf7ada.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/499f898702280d78467be5336d514a00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/848988f68790e43dc63165b0d2e7abc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b411064f777deb23c68fa9e3362e9eb1.png)
A. ![]() | B. ![]() |
C. ![]() | D. ![]() |
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