The unit vector parallel to the resultant of the vectors A = 4i+3j + 6

1.	The unit vector parallel to the resultant of the vectors A = 4i+3j + 6k and B = -i + 3j-8k is
Answer» `(1)/(7) (3 hat(i) + 6hat(J) - 2hat(K))` `(1)/(2) (3HAT(i) + 6hat(j) + 2hat(k))` `(1)/(49) (3 hat(i) + 6hat(j) - 2hat(k))` `(1)/(49) (3hat(i) - 6hat(j) + 2hat(k))` ANSWER :A

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