Question

If v = <5, -4>, find ||v||.

1

29√

41√

21√

Answer 1

\[\Large ||<a,b>|| = \sqrt{a^2+b^2}\]

Answer 2

Can you apply the formula I gave you above here? @davidza6496

Answer 3

i just plug 5 into A^2 and -4 into B^2

Answer 4

5 into a and -4 into b

Answer 5

so what do you get?

Answer 6

i got 3?

Answer 7

did you plug in correctly?

after plug in, it should looks like this: \[\Large \sqrt{(5)^2+(-4)^2}\]

Answer 8

yeah i did it again and got 3

Answer 9

@geerky42

Answer 10

\[\Large\rm \vec v=\left<\color{orangered}{5},\color{royalblue}{-4}\right>\]

\[\Large\rm ||v||=\sqrt{\color{orangered}{5}^2+(\color{royalblue}{-4})^2}\]\[\Large\rm ||v||=\sqrt{25+16}\]Did you remember to square the negative sign?

Answer 11

ohh ok i did it wrong, but i got it now thank you!

Answer 12

Cool :)