1.等差数列{an},{bn}的前n项和分别为Sn,Tn,(1)若Sm=n,Sn=m,求Sn+m(2)若Sn/Tn=(7n+1)/(4n+27),求an/bn2.已知等差数列{an}中,公差d>0,其前n项和为Sn,且满足a2xa3=45,a1+a4=14,(1)通过bn=Sn/(n+c)构造一个新的数列{
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![1.等差数列{an},{bn}的前n项和分别为Sn,Tn,(1)若Sm=n,Sn=m,求Sn+m(2)若Sn/Tn=(7n+1)/(4n+27),求an/bn2.已知等差数列{an}中,公差d>0,其前n项和为Sn,且满足a2xa3=45,a1+a4=14,(1)通过bn=Sn/(n+c)构造一个新的数列{](/uploads/image/z/4049342-62-2.jpg?t=1.%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%7Ban%7D%2C%7Bbn%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8C%E5%88%86%E5%88%AB%E4%B8%BASn%2CTn%2C%EF%BC%881%EF%BC%89%E8%8B%A5Sm%3Dn%2CSn%3Dm%2C%E6%B1%82Sn%2Bm%EF%BC%882%EF%BC%89%E8%8B%A5Sn%2FTn%3D%287n%2B1%29%2F%284n%2B27%29%2C%E6%B1%82an%2Fbn2.%E5%B7%B2%E7%9F%A5%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%7Ban%7D%E4%B8%AD%2C%E5%85%AC%E5%B7%AEd%3E0%2C%E5%85%B6%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BASn%2C%E4%B8%94%E6%BB%A1%E8%B6%B3a2xa3%3D45%2Ca1%2Ba4%3D14%2C%EF%BC%881%EF%BC%89%E9%80%9A%E8%BF%87bn%3DSn%2F%28n%2Bc%29%E6%9E%84%E9%80%A0%E4%B8%80%E4%B8%AA%E6%96%B0%E7%9A%84%E6%95%B0%E5%88%97%7B)
1.等差数列{an},{bn}的前n项和分别为Sn,Tn,(1)若Sm=n,Sn=m,求Sn+m(2)若Sn/Tn=(7n+1)/(4n+27),求an/bn2.已知等差数列{an}中,公差d>0,其前n项和为Sn,且满足a2xa3=45,a1+a4=14,(1)通过bn=Sn/(n+c)构造一个新的数列{
1.等差数列{an},{bn}的前n项和分别为Sn,Tn,(1)若Sm=n,Sn=m,求Sn+m
(2)若Sn/Tn=(7n+1)/(4n+27),求an/bn
2.已知等差数列{an}中,公差d>0,其前n项和为Sn,且满足a2xa3=45,a1+a4=14,(1)通过bn=Sn/(n+c)构造一个新的数列{bn},是否存在一个非零常数c,使{bn}也为等差数列(2)在(1)的条件下,求f(n)=bn/((n+2005)xbn+1)的最大值,n+1是下标
1.等差数列{an},{bn}的前n项和分别为Sn,Tn,(1)若Sm=n,Sn=m,求Sn+m(2)若Sn/Tn=(7n+1)/(4n+27),求an/bn2.已知等差数列{an}中,公差d>0,其前n项和为Sn,且满足a2xa3=45,a1+a4=14,(1)通过bn=Sn/(n+c)构造一个新的数列{
a2xa3=45,a1+a4=a2+a3=14,a2
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