数列An满足:a1=1,a2=a(a>0)数列Bn=AnA(n+1)(2)若Bn是公比为a-1的等比数列是否存在正实数a,使得数列An为等比数列?若存在求出a的值为什么不能像我这样做,b1=a1a2=a假设an为等比,则q=a2/a1bn=a*q^(n-1)=a*(a-1)^
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![数列An满足:a1=1,a2=a(a>0)数列Bn=AnA(n+1)(2)若Bn是公比为a-1的等比数列是否存在正实数a,使得数列An为等比数列?若存在求出a的值为什么不能像我这样做,b1=a1a2=a假设an为等比,则q=a2/a1bn=a*q^(n-1)=a*(a-1)^](/uploads/image/z/2131923-3-3.jpg?t=%E6%95%B0%E5%88%97An%E6%BB%A1%E8%B6%B3%3Aa1%3D1%2Ca2%3Da%28a%EF%BC%9E0%29%E6%95%B0%E5%88%97Bn%3DAnA%28n%2B1%29%282%29%E8%8B%A5Bn%E6%98%AF%E5%85%AC%E6%AF%94%E4%B8%BAa-1%E7%9A%84%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8%E6%AD%A3%E5%AE%9E%E6%95%B0a%2C%E4%BD%BF%E5%BE%97%E6%95%B0%E5%88%97An%E4%B8%BA%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%3F%E8%8B%A5%E5%AD%98%E5%9C%A8%E6%B1%82%E5%87%BAa%E7%9A%84%E5%80%BC%E4%B8%BA%E4%BB%80%E4%B9%88%E4%B8%8D%E8%83%BD%E5%83%8F%E6%88%91%E8%BF%99%E6%A0%B7%E5%81%9A%2Cb1%3Da1a2%3Da%E5%81%87%E8%AE%BEan%E4%B8%BA%E7%AD%89%E6%AF%94%2C%E5%88%99q%3Da2%2Fa1bn%3Da%2Aq%5E%28n-1%29%3Da%2A%28a-1%29%5E)
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