Find a unit vector parallel to the resultant vector RAB of position vectors RA (2,4,-5) and RB (1, 2, 3) O a 0.87 ax + 0.43 ay - 0.29 az Ob. 0.43 ax + 0.87 ay - 0.29 az O. 0.29 ax +0 87 ay - 0.43 az O,d 0.43 ax + 0 29 ay - 0.87 az

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