Mathematics
Undergraduate
この4つの解答と解説を教えて貰えると嬉しいです！！
(1)
h
K=1
3K-1
(13) 2ホート
第2k-1
K=1
n-l
(2) 2K
k=1
n-1
K
(4) Σ b
K=1
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