8.若A为四阶方阵且|A|=3,则|2A|=()。A. 6B. 48C. 12D. 192
8.化简(AB∪C)(AC).
8.若向量组α1,α2,α3线性无关, (beta )_(1)=(alpha )_(1)-(alpha )_(2), (beta )_(2)=(alpha )_
8.曲线 =dfrac ({x)^3+x-2}({x)^2-1}(e)^dfrac (1{x)} 的渐近线条数为 ()-|||-(A)1 (B)2 (C)3
求指导本题解题过程,谢谢您!8.设 alpha =(({a)_(1),(a)_(2),(a)_(3))T , beta =(({b)_(1),(b)_(2),(
8. A ) Attended an economics lecture . ____8____ B ) Taken a walk on Charles S
8.试写出下列反应的主要产物。-|||-CH3-|||-(1) (H)_(3)-C=!=!= C(H)_(2)+HBrarrow -|||-(2) bigcir