Find the unit vector having the same direction as v v 3i j

Find the unit vector having the same direction as v. v = -3i + j u = -3 Squareroot 10/10 i - Squareroot 10/10 j u = -Squareroot 10/3 i + Squareroot 10 j u = -3 Squareroot 10 i + Squareroot 10 j u = -3 Squareroot 10/10 i + Squareroot 10/10 j

Solution

v = -3i + j

|v| = ((-3)²+(1)²) = 10

Let u = unit vector in same direction as v
u = v / |v|

u = (-3/10) i + (1/10) j
u = (-310/10) i + (10/10) j =========> Last option