Unformatted text preview: y = 0, or both). 2. Let P = (1 , − 3) and Q = (3 , 2), and let v be the vector −→ PQ . a. Find a unit vector in the direction of v . Solution: v = 2 i + 5 j , so b v b = √ 29, and the unit vector u = 1 b v b v is given by 2 √ 29 i + 5 √ 29 j . b. Find a vector of length 4 pointing in the same direction as v . Solution: This vector is just 4 u = 4 √ 29 i + 20 √ 29 j ....
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 Winter '07
 Hohnhold
 Math, Calculus, 5J, Standard basis, 5 j, Versor, The Contours

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