已知数列{an}满足a1=1,a(n+1)=an/(3an+1)
2个回答
∵a1=1,a(n+1)=an/(3an+1)
∴1/a(n+1)=1/an+3
∴数列{1/an}是以1为首项,公差3的等差数列
∴1/an=1+3(n-1)=3n-2
∴an=1/(3n-2)
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