抛物线
的顶点为
,与
轴的一个交点
在点
和
之间,其部分图片如图,则以下结论:
①
;②
;③
;④方程
有两个相等的实数根.
其中正确结论的个数为
![](https://img.xkw.com/dksih/QBM/2017/10/21/1800269217505280/1801308158894080/STEM/b7da4b02a39b4a1793666eb2bd490648.png?resizew=195)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f4266e55d88908b64f3d90a9ae7abf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/079dd115a4b8cbc93918a853363786dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc8350b12974ffc8d06fce36d158f02.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9deb79d044a379f31a8fc57736d7ead.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a31d3ff0489fd0dec060f5f1cc30117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669823dbe5e8f4e29ef791b3d17b0399.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b65cc9c2b83f2e321ef86e353340ce8e.png)
其中正确结论的个数为
![](https://img.xkw.com/dksih/QBM/2017/10/21/1800269217505280/1801308158894080/STEM/b7da4b02a39b4a1793666eb2bd490648.png?resizew=195)
A.1个 | B.2个 | C.3个 | D.4个 |
更新时间:2017-10-23 09:13:44
|
【知识点】 二次函数的性质与图象
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较难
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名校
【推荐2】设函数
的定义域为
,若所有点![](https://img.xkw.com/dksih/QBM/2012/9/12/1571011476324352/1571011481690112/STEM/d0ad36fc53754ccca3d1de3db04f4098.png)
构成一个正方形区域,则
的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac4c9e24b314881ca681b4adddf737c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2012/9/12/1571011476324352/1571011481690112/STEM/d0ad36fc53754ccca3d1de3db04f4098.png)
![](https://img.xkw.com/dksih/QBM/2012/9/12/1571011476324352/1571011481690112/STEM/12f0d2670e584b0aa1a9401964170297.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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