問題詳情
8. 已知 a 是正整數，A＝（3a＋2）2＋5（3a＋2）＋4，則 A 必是下列何者的倍數？
(A)5
(B)7
(C)8
(D)9。
(A)5
(B)7
(C)8
(D)9。
參考答案
答案：D
難度：計算中-1
書單：沒有書單，新增
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