1"是"对于任 - 知识问答" property="og:title"/> 1但a(n+1)an"推不出“q>1”如:an=-(1/2)^n,a(n+1)>an" property="og:description"/> 等比数列{an}的公比为q,则"q>1"是"对于任 - 知识问答 1但a(n+1)an"推不出“q>1”如:an=-(1/2)^n,a(n+1)>an"/>
等比数列{an}的公比为q,则"q>1"是"对于任意正整数n,都有an+1>an"的什么条件?