Find |u| ? U=<2,-3>

2 Answers
Apr 11, 2018

#|\u|# asks for the length of the vector.

Explanation:

In other words, you just need to use pythagoras theorem.

#|\u| = sqrt((2)^2+(-3)^2)#

#|\u| = sqrt(13)#

Apr 11, 2018

#|u|=sqrt13#

Explanation:

#"given "ulu=< x,y>" then the magnitude is"#

#|ulu|=sqrt(x^2+y^2)#

#"here "x=2" and "y=-3#

#rArr|ulu|=sqrt(2^2+(-3)^2)=sqrt13#