Answer:
(-0.9 -0.3 -0.3 -0.1)
Explanation:
||u|| is the scalar magnitude of the vector,
given by the formula sqrt(u1^2 + u2^2 ...... uN^2),
where (1 to N) are the dimensions of a vector.
In this case, we have a vector in R4,
Thus that will work out to be sqrt(81 + 9 +9 + 1) = sqrt(100) = 10
Multiply 1/10 to the vector to get the unit vector:
which is (-9/10 -3/10 -3/10 -1/10)