Question

What is `|| < 5 , 3, -3 > ||`?

Answer 1

The norm of a vector `<a,b,c>`

`|| < a , b, c > ||=sqrt(a^2+b^2+c^2)`

Hence

`|| < 5 , 3, -3 > ||=sqrt(5^2+3^2+(-3)^2)=sqrt43=6.56`