Find the length and direction (when defined) of u × v.u = 2i + 2j - k, v = -i + k
A. 9; 
i - j - 
k
B. 3; -
i + j - 
k
C. 3; 
i - j + 
k
D. 9; 
i - j + 
k
Answer: C
Mathematics
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A. 
B. 
C. 
D. 
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What will be an ideal response?
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