保比差数列函数详见附图》

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1 | 2013-3-10 15:29:33 | 显示全部楼层 |阅读模式

令g(an)=lnf(an)1f(an)=1/ang(an)=-ln an=-ln a1*q^(n-1)=-lna1+(n-1)ln q为等差数列f(x)为保比差数列函数2f(an)=an2g(an)=2ln an=2ln a1*q^(n-1)=2[lna1+(n-1)lnq]为等差数列f(x)为保比差数列函数3f(an)=e^ang(an)=ln e^an=an为等比数列4.f(an)=√ang(an)=(1/2)ln an=(1/2)ln a1*q^(n-1)=[lna1+(n-1)lnq]/2为等差数列f(an)为保比差数列函数...

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