Suppose that u, v, w are nonzero and (u v) w = u (v w) = 0 Show that u, v, and w are
Chapter 12, Problem 72(choose chapter or problem)
Suppose that u, v, w are nonzero and (u v) w = u (v w) = 0 Show that u, v, and w are either mutually parallel or mutually perpendicular. Hint: Use Exercise 71.
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