Mathematics
Senior High
Solved
どこが違いますか?!
n
58(-) (1²-1)
n
42, K³²-21
n
= 4 {=n(n+1)] ²-1
= ₁ ({^²+ ≤n)²³ - n
= 4( √n^²+ = n²+1^²³) - n
=htesh²thin
(1²³²²³²n-1)
Jo
③ n(n+2ith-1)
正
Answers
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ありがとうございます!!助かりました💦