9-10高二下·浙江衢州·阶段练习
1 . 已知方程
+
=1表示焦点在y轴上的椭圆,则m的取值范围是
![](https://img.xkw.com/dksih/QBM/2010/4/12/1569696237862912/1569696242581504/STEM/a25e9f4f45c243b4be7df372023d8ac7.png)
![](https://img.xkw.com/dksih/QBM/2010/4/12/1569696237862912/1569696242581504/STEM/376ef426a7334e86a5c1a6c6618286f5.png)
A.m<-1或1<m<![]() | B.1<m<2 |
C.m<-1或1<m<2 | D.m<2 |
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A.m<-1或1<m<![]() | B.1<m<2 |
C.m<-1或1<m<2 | D.m<2 |