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Suppose that you are checking your work on a test, and see that you have computed the cross product of v = i + 2j

Suppose that you are checking your work on a test, and see that you have computed the cross product of v = i + 2j 3k and w = 2i j + 2k. You got v w = i + 8j 5k. Without actually redoing v w, how can you spot a mistake in your work?

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