A. -1
B. (2,-1,-2)
C. (-1,1,1)
D. (1,-5,-3)
设overrightarrow(a)=(1,-1,2),overrightarrow(b)=(3,-2,-1),则overrightarrow(a)×overr
设overrightarrow(a)=(-1,1,2),overrightarrow(b)=(2,-2,-4),则向量|overrightarrow(a)×ov
设overrightarrow(a)=(1,1,4),overrightarrow(b)=(1,-2,2),则overrightarrow(a)+overrig
已知overrightarrow(a)=(2,1,-1), overrightarrow(b)=(1,-1,2), 则overrightarrow(a)time
若overrightarrow(a)=(1,2,3),overrightarrow(b)=(-1,0,1),以overrightarrow(a),overrig
设向量 overrightarrow (a)=(1,2,3) 、 overrightarrow (b)=(2,0,1), 则向量 overrightarrow
已知向量overrightarrow(a)=(0,1),overrightarrow(b)=(2,x),若overrightarrow(b)⊥(overrigh
向量overrightarrow(a)、overrightarrow(b)、overrightarrow(c)两两垂直,且|overrightarrow(a)|
已知|overrightarrow(a)|=2,|overrightarrow(b)|=sqrt(3),overrightarrow(a)与overrighta
化简:(1)overrightarrow(BC)+overrightarrow(AB);(2)overrightarrow(DB)+overrightarrow