問題詳情
23.設向量
,則下列敘述何者正確?
(A)若
平行,則a = -
(B)若
(C)若
(D)若
,則a = 0

(A)若

(B)若

(C)若

(D)若

參考答案
答案:B[無官方正解]
難度:適中0.666667
統計:A(0),B(2),C(1),D(0),E(0)
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