Find the length and direction (when defined) of u × v.u = - 
i + 
j + k, v = i + j + 2k
A. 2
; - 
i + 
j - 
k
B. 8; 
i - 
j + 
k
C. 2
; 
i + 
j - 
k
D. 8; 
i - 
j - 
k
Answer: C
Mathematics
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