Mathematics
Senior High
解答お願いします🙏💦
as=7, ao=-8 である等差数列 (a»} (n=D1, 2, 3, …)について
(1) 一般項 a, と初項から第n項までの和 S, を求めよ。
(2) S,の最大値を求めよ。
(3) ai+as+as+
… +a2n-1を求めよ。
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