20 設 C 為圓| z |=1之封閉曲線,求
= ?
(A) 1
(B)2πi
(C) 0
(D)π
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統計: A(2), B(0), C(2), D(0), E(0) #1050239
統計: A(2), B(0), C(2), D(0), E(0) #1050239