SOLUTION: show that the vectors a=2i+3j-k and b=3i-j+3k are perpendicular

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Question 1152219: show that the vectors a=2i+3j-k and b=3i-j+3k are perpendicular
Answer by Alan3354(69443) About Me  (Show Source):
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show that the vectors a=2i+3j-k and b=3i-j+3k are perpendicular
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The dot product = 0 ---> perpendicular