关于
的方程
有且仅有两个实数根,则实数
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d3cfe73d67c5b219eadfdf98e1c62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
20-21九年级上·全国·课后作业 查看更多[2]
更新时间:2020-10-27 17:57:22
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【知识点】 根据二次函数图象确定相应方程根的情况解读
相似题推荐
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较难
(0.4)
名校
【推荐1】抛物线
经过点
,与
轴的交点在
与
之间(不包括这两点),对称轴为直线
.下列结论:①
;②若点
、
在图象上,则
;③若
为任意实数,则
;④
.其中正确结论的序号为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6554ac3dff4a59833e407db887f6e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fa71aa2ea224669698850108751a71a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bd685943cf39f7945b31e42d6221788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a31d3ff0489fd0dec060f5f1cc30117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7714348f7b287fa15dc55a79a1cfc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2fa10c0ceb7ae3303d36df7e95c70b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9875f2098b87dd458efca31098a5be7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1832a0a902e43b536d783913453ce9ed.png)
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【推荐2】在平面直角坐标系中,将抛物线
绕点
旋转
后,得到抛物线
,定义抛物线
和
上位于
范围内的部分为图像
.若一次函数
的图像与图像
有两个交点,则k的范围是:__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6990c7d045c0d4a1046819189f4374b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47b6fd5a1dbb65cbe9bfe602c914a24f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab94459e87c666facddbe1a23ae1899d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e15a6e55d5e99258f3c2430156cefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab94459e87c666facddbe1a23ae1899d.png)
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