若 a=35 × 21 × 15 ，則 a 的平方根為何? (A) ±105 (B) ±35 (C) ±21 (D) ±15

問題詳情

2.若 a=35 × 21 × 15 ，則 a 的平方根為何?
(A) ±105
(B) ±35
(C) ±21
(D) ±15

參考答案

答案：A
難度：計算中-1
書單：沒有書單，新增

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