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Math Homework Question: Use the cross product to find a unit vector orthogonal to both u...

Math Homework Question:

Use the cross product to find a unit vector orthogonal to both u = (1, 2, 3) and v = (4, 5, 6).

Determine a nonzero vector orthogonal to both u = (3, 1, 1, 1) and v = (5, −1, 1, −1). Why can you not use the same method as in part (a)?

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