Mathematics
Senior High
この問題の間違っている部分を教えていただきたいです。
+(k+2) (K-3)
h
6-1
6
(ピートー6)
Fik - $6
n(n+1) (2n+1)- = n(n+1)-6 n
6 h { (n+1) (2n+1)-3(n+1)-36}
6
n (2n²+h+2n+1 = 3^-3-36)
±n (2n-39)
1+2 1+
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わあ！ほんとだありがとうございます🙏