已知数列{an}和{bn}满足bn=a1+2a2+3a3+L+nan/1+2+3+L+n,求证:{an}为等差数列时{bn}必为等差数列;反而亦然
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![已知数列{an}和{bn}满足bn=a1+2a2+3a3+L+nan/1+2+3+L+n,求证:{an}为等差数列时{bn}必为等差数列;反而亦然](/uploads/image/z/3618700-52-0.jpg?t=%E5%B7%B2%E7%9F%A5%E6%95%B0%E5%88%97%7Ban%7D%E5%92%8C%7Bbn%7D%E6%BB%A1%E8%B6%B3bn%3Da1%2B2a2%2B3a3%2BL%2Bnan%2F1%2B2%2B3%2BL%2Bn%2C%E6%B1%82%E8%AF%81%EF%BC%9A%7Ban%7D%E4%B8%BA%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%E6%97%B6%7Bbn%7D%E5%BF%85%E4%B8%BA%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%EF%BC%9B%E5%8F%8D%E8%80%8C%E4%BA%A6%E7%84%B6)
已知数列{an}和{bn}满足bn=a1+2a2+3a3+L+nan/1+2+3+L+n,求证:{an}为等差数列时{bn}必为等差数列;反而亦然
已知数列{an}和{bn}满足bn=a1+2a2+3a3+L+nan/1+2+3+L+n,求证:{an}为等差数列时{bn}必为等差数列;
反而亦然
已知数列{an}和{bn}满足bn=a1+2a2+3a3+L+nan/1+2+3+L+n,求证:{an}为等差数列时{bn}必为等差数列;反而亦然
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