等差数列{an}的各项均为正数,a1=3,前n项和为Sn,{bn}为等比数列,b1=1,且b2S2=64,数列,{Ban}是公差为64的等比数列(1)求数列{an},{Bn}的通项公式(2)求证1/S1+1/S2+1/S3+1/S4.1/Sn
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![等差数列{an}的各项均为正数,a1=3,前n项和为Sn,{bn}为等比数列,b1=1,且b2S2=64,数列,{Ban}是公差为64的等比数列(1)求数列{an},{Bn}的通项公式(2)求证1/S1+1/S2+1/S3+1/S4.1/Sn](/uploads/image/z/3623436-36-6.jpg?t=%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%EF%BD%9Ban%EF%BD%9D%E7%9A%84%E5%90%84%E9%A1%B9%E5%9D%87%E4%B8%BA%E6%AD%A3%E6%95%B0%2Ca1%3D3%2C%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BASn%2C%EF%BD%9Bbn%EF%BD%9D%E4%B8%BA%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%2Cb1%3D1%2C%E4%B8%94b2S2%3D64%2C%E6%95%B0%E5%88%97%2C%EF%BD%9BBan%EF%BD%9D%E6%98%AF%E5%85%AC%E5%B7%AE%E4%B8%BA64%E7%9A%84%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%EF%BC%881%EF%BC%89%E6%B1%82%E6%95%B0%E5%88%97%EF%BD%9Ban%EF%BD%9D%2C%EF%BD%9BBn%EF%BD%9D%E7%9A%84%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8F%EF%BC%882%EF%BC%89%E6%B1%82%E8%AF%811%2FS1%2B1%2FS2%2B1%2FS3%2B1%2FS4.1%2FSn)
等差数列{an}的各项均为正数,a1=3,前n项和为Sn,{bn}为等比数列,b1=1,且b2S2=64,数列,{Ban}是公差为64的等比数列(1)求数列{an},{Bn}的通项公式(2)求证1/S1+1/S2+1/S3+1/S4.1/Sn
等差数列{an}的各项均为正数,a1=3,前n项和为Sn,{bn}为等比数列,b1=1,且b2S2=64,
数列,{Ban}是公差为64的等比数列
(1)求数列{an},{Bn}的通项公式
(2)求证1/S1+1/S2+1/S3+1/S4.1/Sn
等差数列{an}的各项均为正数,a1=3,前n项和为Sn,{bn}为等比数列,b1=1,且b2S2=64,数列,{Ban}是公差为64的等比数列(1)求数列{an},{Bn}的通项公式(2)求证1/S1+1/S2+1/S3+1/S4.1/Sn
公差64的等比数列?q=64?→d=-5,这样就很明显了..