已知抛物线y=2x2+4x+k-1与x轴有两个交点,求k的取值范围. 发布时间:2017-05-14 13:47 │ 来源:www.tikuol.com 题型:解答题 问题: 已知抛物线y=2x2+4x+k-1与x轴有两个交点,求k的取值范围.
题型:解答题 Everyone who heard Mr. Green's story it.A. laughed at B. was laughed C. laughed D. was laughed at 查看答案