問題詳情
3. ( )計算等差級數30＋33＋36＋……＋90的和＝？
(A)1000
(B) 1020
(C) 1030
(D) 1260
(A)1000
(B) 1020
(C) 1030
(D) 1260
參考答案
無參考答案
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