关于x的方程kx2+3x﹣1=0有实数根，则k的取值范围是_刷题宝

题干

关于x的方程kx²+3x﹣1=0有实数根，则k的取值范围是（）

A：k≤ $\frac{9}{4}$

B：k≥﹣ $\frac{9}{4}$ 且k≠0

C：k≥﹣ $\frac{9}{4}$

D：k＞﹣ $\frac{9}{4}$ 且k≠0

上一题下一题 0.0难度选择题更新时间:2019-04-10 09:47:40

答案(点此获取答案解析）

C

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