Mathematics
Senior High
Resolved
シグマの計算がわかりません
よければ手書きだと嬉しいです
このもんだいの解き方教えてください🚨🚨🚨🚨🚨🚨
n-1
=a₁+4=1+
R=1
EO
4(41–1)
4-1
Answers
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加えて最終的の答えの計算の仕方も詳しく教えて欲しいです🙇♀️🙇♀️🙇♀️