若数列{an},满足a1=2,an+1(n+1是a的脚标)=3an+2,求数列通项公式

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若数列{an},满足a1=2,an+1(n+1是a的脚标)=3an+2,求数列通项公式若数列{an},满足a1=2,an+1(n+1是a的脚标)=3an+2,求数列通项公式若数列{an},满足a1=2

若数列{an},满足a1=2,an+1(n+1是a的脚标)=3an+2,求数列通项公式
若数列{an},满足a1=2,an+1(n+1是a的脚标)=3an+2,求数列通项公式

若数列{an},满足a1=2,an+1(n+1是a的脚标)=3an+2,求数列通项公式
a(n+1)=3an+2
a(n+1)+1=3an+3
[a(n+1)+1]/[an+1]=3
{an+1}是以3为首项,3为公比的等比数列
an=3^n-1