Question

what is the length magnitude of the vector 2,-1?

Answer 1

\[|v|=|<a.b>|=\sqrt{a^2+b^2}\]

Answer 2

what is the the formula, and what a and b i dont understand what you just wrote

Answer 3

a=2 and b=-1
where v is the vector <a,b>=<2,-1>

Answer 4

just plug in 2 for a and -1 for b

Answer 5

and you will be done :) after simplifying

Answer 6

1.73?

Answer 7

\[\sqrt{(2)^2+(-1)^2}=\sqrt{4+1}=\sqrt{5}\]

Answer 8

sqrt 5

Answer 9

a vector has both a magnitude and a ?


is it a number?

Answer 10

direction