20-21高一·全国·课后作业
1 . 函数y=
x,y=2x,y=3x的图象(如图)分别是________ .(用序号作答)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faa7a9b38959399809e87bf4ba851b35.png)
![](https://img.xkw.com/dksih/QBM/2020/8/24/2534841401344000/2536886584320000/STEM/72d83f1c7e4d41e3bf139d13a23cd410.png?resizew=171)
您最近一年使用:0次
2 . 关于
的方程
有实根,则
的取值范围是____________ .
![](https://img.xkw.com/dksih/QBM/2015/11/25/1572306255101952/1572306260344832/STEM/89a6e47339684a7e9635e34a4bb1cd96.png?resizew=13)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1119314a2ce5efe686d309d9710b669e.png)
![](https://img.xkw.com/dksih/QBM/2015/11/25/1572306255101952/1572306260344832/STEM/0e4deb05faff4a2eb5f62ff8ac8027bc.png?resizew=17)
您最近一年使用:0次