From your answers in 7, you should have noticed that j kv j = j k j j v j. So, (the
Chapter 12, Problem 9(choose chapter or problem)
From your answers in 7, you should have noticed that j kv j = j k j j v j. So, (the length of kv) = (the modulus of k) (the length of v). By letting v = v1 v2 , prove that j kv j = j k j j v j.
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