Find the length and direction (when defined) of u × v.u = -2i + 4j - 4k, v = 4i - 8j + 8k
A. 6
; 
(2i - 4j + 4k)
B. 6
; 
(2i - 4j + 4k)
C. 0; 2i- 4j + 4k
D. 0; no direction
Answer: D
Mathematics
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