题目

|a1 a2 a3-|||-1.设 |b1 b2 a=1 b=1 c=1 . =2, 则 |} (a)_(1)& (a)_(2) 2(a)_(1)-3(b)_(1)& 2(a)_(2)-3(b)_(2) (c)_(1)& (c)_(2) | . 2a3-3b3 = () .-|||-|c1 C2 C3-|||-A.4 B .-4 C.6 D. -6

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