Mathematics
Senior High
一般項が分かりません。解答はありません。
正の整数からなる数列{an},{bn}が以下の3つの条件を満たすとき,{an}の一般項を求
めよ.
1.a1 = 1,61 =2
2.an <bn <an+1 <36n (n = 1, 2, 3, ...)
3. (an)2-3anbn+(bm)2 =-1 (n = 1, 2, 3, ...)
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