等差数列{an} {bn}前n项和为An Bn,An/Bn=(7n+2)/(4n+27),求an/bn

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等差数列{an} {bn}前n项和为An Bn,An/Bn=(7n+2)/(4n+27),求an/bn
等差数列{an} {bn}前n项和为An Bn,An/Bn=(7n+2)/(4n+27),求an/bn

等差数列{an} {bn}前n项和为An Bn,An/Bn=(7n+2)/(4n+27),求an/bn
A(2n-1)=(a1+a(2n-1))/2*(2n-1)=2an/2*(2n-1)=an*(2n-1)
同理B(2n-1)=b*(2n-1)
于是an/bn=A(2n-1)/B(2n-1)=(14n-5)/(8n+23)

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