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posted by J Wednesday, May 9, 2012 at 1:30am.

Determine the vector u = AB and its magnitude, given A(3,7,-2) and B(9,1,5).

u = [9-3,1-7,5+2] = [6,-6,7] |u| = √(36+36+49) = √121 = 11

thankyou!

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