Mathematics
Senior High
Resolved
(1)(2)教えてください🙏🏻🙏🏻
4 の区の第を項 初項から第み項までの和S
コナ i+4+7tnts 旨
1+3+9, 139二27. 1+3+9+27+a 間
1 Na
(信司! ふ
物 5 0や"い 1十5十9十……十(4ヵー
5用語 sk5良 3
)
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