Mathematics
Senior High
最後の段の公式に当てはめる時、n-1ではなくnを使う理由はなんですか？
I
3
1k
57 (1) (-3)*
Σ
k=0
0858
=1+(-1/2)+(-1/2)
3
1.{1-(-
+･･････+
1\n-1
3
1\n
3
3
4
(一部)
n
18
2
18
2
512
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