Question

What is `|| <-3, 5, 1> - < 4 , -7, 4 > ||`?

Answer 1

`sqrt202~~14.21`.

Explanation:

Let, `vecx=(-3,5,1), and, vecv=(4,-7,4)`.

`:. vecu-vecv=(-3-4,5-(-7),1-4)=(-7,12,-3)`,

`:. ||vecu-vecv||=sqrt{(-7)^2+12^2+(-3)^2}`,

`=sqrt(49+144+9)`.

`rArr ||vecu-vecv||=sqrt202~~14.21`.