Mathematics
Senior High

最後の方の計算がわかりません( ˘•ω•˘ ).。oஇ
詳しく教えて欲しいです🙇‍♀️

(5) (3*-4³) 23* - 2k³ k=1 k=1 = = - = k=1 n an 23.3-1–24191] k=1 (1)(11) くくり出す k=1 3(3-1) 3-1 - { + / + n(n+1) } ² 2 {2.3¹+¹ — n²(n + 1)² − 6} 08

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こちらでいかがでしょうか?
分からない部分あれば聞いてください!

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