S5=5(a1+a5)/2=5*(2a3)/2=5a3
Sn/Tn=3n+1/2n+5,
a3/b3=S5/T5=(3*5+1)/(2*5+5)=16/15,
等差数列an,bn的前n项和Sn,Tn满足Sn/Tn=3n+1/2n+5,则a3/b3=
等差数列an,bn的前n项和Sn,Tn满足Sn/Tn=3n+1/2n+5,则a3/b3=
数学人气:595 ℃时间:2020-03-07 11:47:07
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