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1. 等差數列中,a1為首項,有 n 項且總和為n S ,下列四個選項,何者錯誤?(A) (B) (C) (D)
問題詳情
1. 等差數列中,a1為首項,有 n 項且總和為n S ,下列四個選項,何者錯誤?
(A)
(B)
(C)
(D)
參考答案
答案:B
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)
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【B】 Anne:Oh, my! Is that you, Hank?Hank:Yes, Anne. It’s been a long time since we met. Anne:You’ve
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