Prove that if c1 and c2 are scalars and u1 and u2 are vectors,then (c1u1) (c2u2) =
Chapter 8, Problem 61(choose chapter or problem)
Prove that if c1 and c2 are scalars and u1 and u2 are vectors,then (c1u1) (c2u2) = c1c2(u1 u2).
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