Question

65. The unit vector parallel to the resultant of the vectors A=4i+3j+ 6k and B=-i+3j-8k is
A) 1/7(3i+6j-2k)
B) 1/7(3i+6j+k)
C) 1/49(3i+6j-2k)
D 1/49(3i-6j+2k)
​ pls solve this question correct explanation will be marked as brainliest
plsss

Answer 1

Answer:

first we have to take A+B=3i+6j-2k

then magnitude of A+B=√49=7

then for unit vector=A+B/7

according to this option 1 is correct