Question: Find a + b , 9 a + 3 b , | a | , and | a - b | . ( S i

Find a+b,9a+3b,|a|, and |a-b|.(Simplify your vectors completely.)
a=7i-6j+3k,b=3i-9k
a+b=
9a+3b=
|a|=
|a-b|=
Find a + b , 9 a + 3 b , | a | , and | a - b | .

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