二次函数
的部分对应值如下表:
设关于
的一元二次方程
的两个根分别为
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97dad16e4910ec15add074c4077b0e86.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97dad16e4910ec15add074c4077b0e86.png)
更新时间:2024-01-25 21:58:33
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【推荐1】已知
,
是关于
的一元二次方程
的两个实数根,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e7b70c75c8b1f08db7a6df4b05279a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】关于x的一元二次方程
的一个根是0,则k的值是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f37855c7037868659f3b8a2d7c893c67.png)
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【推荐1】在平面直角坐标系中,已知二次函数
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______ .
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【推荐2】已知函数
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,
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【推荐1】已知
,
是抛物线
上的两点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
______
.(选填“
”、“
”、“
”)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a17431f86f35afcf3ee7e0c4a9dee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a9e08b4b3412b182d89a2dd405266c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb6f055a340aa65fb369110d842cd1f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
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【推荐2】二次函数
满足以下条件:当
时,它的图象位于x轴的下方;当
时,它的图象位于x轴的上方,则c的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a02bdd28c0e0b73d3316aec5d9a7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/518ab466bba23578adc6a71a0b0f3d6d.png)
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【推荐1】二次函数
的图像如图所示,根据图像可知:当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
______ 时,方程
有两个不相等的实数根.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/22fbff3d-ac34-47ff-bca3-512d388b35a9.png?resizew=175)
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【推荐2】若m、n(m<n)是关于x的方程5-(x-a)(x-b)=0的两根,且a<b,则a、b、m、n的大小关系为_____ .
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