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Let a = (1,-2,3) and b = (3,1,2) be two ...

Let a = (1,-2,3) and b = (3,1,2) be two vectors and c be a vector of length l and parallel to (a + b). What is c equal to ?

A

`1/sqrt14 (-2,-3,1)`

B

`1/sqrt2 (1,0,1)`

C

`1/sqrt42 (-5,-4,-1)`

D

None of the above

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The correct Answer is:
D
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