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1 “王老师,我为什么错了?”数学归纳法第一节课后布置的作业中有这样一道题:数列{a_n}对一切自然数 n 满足 a_1+a_2/r+a_3/r~2+…+a_n/r~(n-1)=-6n,其中 r 为正常数,求数列{a_n}的通项公式.
1 “Mr. Wang, why am I wrong?” There is a question in the homework assignment after the first class of mathematics induction: the sequence {a_n} satisfies a_1+a_2/r+a_3/r~2+ for all natural numbers n... +a_n/r~(n-1)=-6n, where r is a normal number, find the general term formula for the series {a_n}.