等差数列an,bn的前n项和分别为Sn,Tn,若Sn/Tn=[7n+3]/[n+3],则a8/b8=?跪求,要过程的
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![等差数列an,bn的前n项和分别为Sn,Tn,若Sn/Tn=[7n+3]/[n+3],则a8/b8=?跪求,要过程的](/uploads/image/z/5483619-27-9.jpg?t=%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97an%2Cbn%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8C%E5%88%86%E5%88%AB%E4%B8%BASn%2CTn%2C%E8%8B%A5Sn%2FTn%3D%5B7n%2B3%5D%2F%5Bn%2B3%5D%2C%E5%88%99a8%2Fb8%3D%3F%E8%B7%AA%E6%B1%82%2C%E8%A6%81%E8%BF%87%E7%A8%8B%E7%9A%84)
等差数列an,bn的前n项和分别为Sn,Tn,若Sn/Tn=[7n+3]/[n+3],则a8/b8=?跪求,要过程的
等差数列an,bn的前n项和分别为Sn,Tn,若Sn/Tn=[7n+3]/[n+3],则a8/b8=?
跪求,要过程的
等差数列an,bn的前n项和分别为Sn,Tn,若Sn/Tn=[7n+3]/[n+3],则a8/b8=?跪求,要过程的
S15=(A1+A15)×15/2=(A1+A1+14d)×15/2=15(A1+7d)=15A8
同理T15=15B8
A8/B8=S15/T15=(7×15+3)/(15+3)=6
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