Mathematics
Senior High
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どうしてこうなるんですか?ここはなんで消えたんですか?
(3) Σ th= 45 k
= 4. I^(n-1) ({(n-1) 41}
= 2n (n-1)
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どうしてこうなるんですか?ここはなんで消えたんですか?
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n-1だとこうなるんじゃないんですか?😭😭