用特征方程求数列通项公式试题已知a(1)=a(2)=1,a(n)=4a(n-1)-a(n-2)求(1)通项公式(2)a(n)a(n-2)-a(n-1)^2的值第一题做出来是这个样子再发个,图不清楚
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![用特征方程求数列通项公式试题已知a(1)=a(2)=1,a(n)=4a(n-1)-a(n-2)求(1)通项公式(2)a(n)a(n-2)-a(n-1)^2的值第一题做出来是这个样子再发个,图不清楚](/uploads/image/z/1102012-52-2.jpg?t=%E7%94%A8%E7%89%B9%E5%BE%81%E6%96%B9%E7%A8%8B%E6%B1%82%E6%95%B0%E5%88%97%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8F%E8%AF%95%E9%A2%98%E5%B7%B2%E7%9F%A5a%EF%BC%881%EF%BC%89%3Da%EF%BC%882%EF%BC%89%3D1%2Ca%EF%BC%88n%EF%BC%89%3D4a%EF%BC%88n-1%EF%BC%89-a%EF%BC%88n-2%EF%BC%89%E6%B1%82%EF%BC%881%EF%BC%89%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8F%EF%BC%882%EF%BC%89a%EF%BC%88n%EF%BC%89a%EF%BC%88n-2%EF%BC%89-a%EF%BC%88n-1%EF%BC%89%5E2%E7%9A%84%E5%80%BC%E7%AC%AC%E4%B8%80%E9%A2%98%E5%81%9A%E5%87%BA%E6%9D%A5%E6%98%AF%E8%BF%99%E4%B8%AA%E6%A0%B7%E5%AD%90%E5%86%8D%E5%8F%91%E4%B8%AA%EF%BC%8C%E5%9B%BE%E4%B8%8D%E6%B8%85%E6%A5%9A)
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