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posted by Anonymous Tuesday, April 13, 2010 at 12:37am.
find the vector V with the given magnitude and the same direction as U. mag V=2 U=<3,-3>
A unit vector along [3,-3] is [3/√18,-3/√18] so one of length 2 is [6/√18, -6/√18] or [√2, -√2] after rationalizing
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