問題詳情
9.若數列 a , b , c 為一等差數列，且公差為 5，則關於數列 a－3 , b－6, c－9 的敘述，下列何者正確？
(A)是公差為 5 的等差數列
(B) 是公差為－3 等差數列
(C) 是公差為 2 的等差數列
(D) 不是等差數列
(A)是公差為 5 的等差數列
(B) 是公差為－3 等差數列
(C) 是公差為 2 的等差數列
(D) 不是等差數列
參考答案
答案：C
難度：計算中-1
書單：沒有書單，新增
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