数列{an}的前n项和为Sn,若a1=1,a(n+1)=3Sn(n≥1),则a6=?答案是3×4^4 答案是3×4^4

问题描述:

数列{an}的前n项和为Sn,若a1=1,a(n+1)=3Sn(n≥1),则a6=?答案是3×4^4
答案是3×4^4