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已知数列的递推关系式,求数列通项公式的方法一般分为两类:一类是根据前几项的特点,归纳猜想出通项的表达式,然后用数学归纳法证明;另一类是将已
Knowing the recurrence relation of series, the method of finding the general term formula of a series is generally divided into two categories: one is the induction of the expression of the guess term based on the characteristics of the previous items, and then it is proved by mathematical induction; The class is already