Question 1201931
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(1)  Calculate the magnitude of vector (q)  


     |q| = {{{sqrt(3^2 +(-1)^2+1.5^2)}}} = {{{sqrt(9 + 1 + 2.25)}}} = {{{sqrt(12.25)}}} = 3.5.



(2)  Notice that the magnitude of vector (r), 10.5, is three times 
     the magnitude of vector {q), 3.5.



(3)  With the condition of parallelity, it means that each components of vector 
     {r) is three times the corresponding component of vector (q).


     So,  (r) = (9i) - (3j) + (4.5k).      <U>ANSWER</U>
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Solved.