Question: Known: , vec ( A ) = - vec ( i ) + 2 vec ( j ) + vec ( k ) , vec

Known: ,vec(A)=-vec(i)+2vec(j)+vec(k),vec(B)=2vec(i)-vec(k),vec(C)=vec(i)-vec(j)+2vec(k)
Find: (1) vec(A)*vec(B)=?
(2) vec(C)*(vec(A)+vec(B))=?
(3) vec(B)vec(A)=?
(4)(vec(B)+vec(C))vec(A)=?
Known: , vec ( A ) = - vec ( i ) + 2 vec ( j ) +

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