# Math Help - Lill vector prob

1. ## Lill vector prob

Hiy guys,
Could anyone help me with this vector prob..

if u1 is a column vector [1 2]

w1 = u1/|u1| = 1/ √5 * column vector [1 2]

My question is ,where do we get the 1 from?
Do we always just put one over the modulus of the vector ?

Thanks and any help will be appreciated.

Cheers,
Amazedxxx

2. Originally Posted by Amazed
Hiy guys,
Could anyone help me with this vector prob..

if u1 is a column vector [1 2]

w1 = u1/|u1| = 1/ √5 * column vector [1 2]

My question is ,where do we get the 1 from?
Do we always just put one over the modulus of the vector ?

Thanks and any help will be appreciated.

Cheers,
Amazedxxx

The 1 is there because we are dividing by |u1|, which is a scalar. I's the same concept as the 1 in following:
x/3 = (1/3)*x

-Dan