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19. 設 a 為正整數,若 也是正整數,則所有可能的 a 之和為多少?(A) 178 (B) 187 (C) 198 (D) 209
問題詳情
19. 設 a 為正整數,若
也是正整數,則所有可能的 a 之和為多少?
(A) 178
(B) 187
(C) 198
(D) 209
參考答案
答案:C
難度:適中0.471698
統計:A(2),B(7),C(25),D(4),E(0)
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