若双曲线x2a2-y2b2=1(a>0,b>0)的渐近线与抛物线y=x2+2有公 发布时间:2017-04-29 15:24 │ 来源:www.tikuol.com 题型:选择题 问题: 若双曲线x2a2-y2b2=1(a>0,b>0)的渐近线与抛物线y=x2+2有公共点,则此双曲线的离心率的取值范围是( )A.[3,+∞)B.(3,+∞)C.(1,3]D.(1,3)
题型:选择题 Double Eagle II, the first trans-Atlantic balloon, was greeted by avid crowds in France.A.eagerB.surgingC.appreciativeD.vigorous 查看答案