Find a unit vector that has the same direction as the given vector - 12.2.24 Cengage Calculus

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Problem 12.2: 24, Cengage Calculus 9th Edition
Cengage Calculus, 9th Edition Chapter 12: Vectors and the Geometry of Space 12.2 Vectors, problem 24, 12.2.24, Find a unit vector that has the same direction as the given vector, Find a + b, 4a + 2b, |a|, and |a - b|, 19, 20, 21 and 22 Find , , , and .19.
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