当n≥2时,an=Sn-S(n-1)由Sn²=an(Sn-1)得Sn²=(Sn-S(n-1))(Sn-1)化简得S(n-1)-Sn=SnS(n-1)即1/Sn-1/S(n-1)=1于是数列{Sn}是以1/s1=1,1为公差的等差数列所以1/Sn=1+(n-1)即Sn=1/n设bn=log2[Sn/S(n+2)]= log2[...
数列(an)中,a1=1当n≥2时,其前n项和Sn满足Sn^2=an(Sn-1)
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