已知函数y=ax2+bx+c(a≠0)的图象经过点(-1,3)和(1,1)两点, 发布时间:2017-05-05 14:22 │ 来源:www.tikuol.com 题型:选择题 问题: 已知函数y=ax2+bx+c(a≠0)的图象经过点(-1,3)和(1,1)两点,若0<c<1,则a的取值范围是( )A.(1,3)B.(1,2)C.[2,3)D.[1,3]
题型:选择题 I am very thankful to my English teacher, I have made great progress. [ ]A. by whose help B. with whose help C. with his help D. by his help 查看答案