抛物线
的部分图象如图所示,其对称轴
,且与
轴的一个交点在点
和
之间.则下列结论:①
;②
;③
,其中
;④一元二次方程
必有一个根
,且
.其中正确的结论是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc90b02a4cd1425aabfc192b1cdee17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f28d35611af6d2c64ad19771297f1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab979573ebf184127b7117aa9c330d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77694c11ba40ec5c2fc4f6a05e31a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da04f641c850a75a63031d5aed2e0625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba8d17f6fb065753d689b8b007cb84b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4967f87cd5be9fed1587f48324b12c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2c4e84174c08d93ac80a9b3cfda20c9.png)
A.①② | B.①③ | C.②④ | D.③④ |
更新时间:2024-04-17 13:03:52
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【推荐1】已知二次函数
(a<0)的图象过点(1,0)和(x1,0),且﹣2<x1<﹣1,下列4个判断中:①a+b=-1;②a>b﹣1;③b﹣a<0;④﹣1<a<﹣
,正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75929925842ca723b34647ccaa596cdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
A.①②③ | B.①②④ | C.①③④ | D.②③④ |
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【推荐2】如图,二次函数
图像的一部分与x轴的一个交点坐标为
,对称轴为直线
,结合图像给出下列结论:
①
;②
;③
;
④关于x的一元二次方程
有两个不相等的实数根;
⑤若点
,
均在该二次函数图像上,则
.其中正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3a2f5b0702ea9fbb9dc8904579737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc20d351d51723c9b0a07a20ac14114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb1beec07792cbfc2f46de2aa151c5d6.png)
④关于x的一元二次方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c663d51f24bddd620244f0d0fa1d5be.png)
⑤若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a574b4e5adc18b94c22822cf1d0b3b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d14ce27f092b51728a9fd019320b19a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1292c47f62023b747f1a4bd615c75284.png)
A.4 | B.3 | C.2 | D.1 |
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【推荐1】如图,在
中,
,
,
,点
从点
沿
向点
以
的速度运动,同时点
从点
沿
向点
以
的速度运动(点
运动到点
停止),在运动过程中,四边形
的面积最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/10/46cef209-5e51-4bb0-a91a-c683843e15f1.png?resizew=233)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cd4a1c8087ef697d82b321a3331211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432043f79e122f291c47453013042704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631e6ec24d3d67bf4592313b6b3f4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d989a128e30a701dfff5592476a76bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e98eb6db9c24321307c445af89a855.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/10/46cef209-5e51-4bb0-a91a-c683843e15f1.png?resizew=233)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】把二次函数y=﹣(x+1)2﹣3的图象沿着x轴翻折后,得到的二次函数有( )
A.最大值y=3 | B.最大值y=﹣3 | C.最小值y=3 | D.最小值y=﹣3 |
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【推荐1】二次函数
(a,b,c为常数)中,x与y的部分对应值如下表:
以下结论:①该二次函数图象开口向上;
②当
时,该二次函数取最大值为1;
③当
时,
;
④若点
,
在该二次函数图象上,则
;
其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
x | … | 1 | 2 | 3 | 4 | … |
y | … | 0 | 1 | 0 | … |
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b27aee52676f4237adac068fe745fde.png)
④若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a80145f7d22a1e6e606b3ef8496fa081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7359e79b10a5e35f1440eb24212d3c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2210f152080d9a68a97c805f5c1cde96.png)
其中正确的是( )
A.①②③ | B.①②④ | C.②③ | D.②③④ |
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【推荐2】已知二次函数
图象如图所示,对称轴为直线
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc90b02a4cd1425aabfc192b1cdee17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次