Question

The unit vector oppositely directed to −4i+j is??? i need help please.

Answer 1

vector is
<-4,1>
for opposite direction multiply with -1
<4,-1>
magnitude is
\[\Large \sqrt{4^2+1^2}=\sqrt{17}\]

divide each component with magnitude to get unit vector.

Answer 2

i tried <4,-1>. its wrong

Answer 3

the required answer will be when you divide by magnitude
\[\Large <\frac{4}{\sqrt{17}},\frac{-1}{\sqrt{17}}>\]

Answer 4

could u also solve The unit vector that has the same direction as the vector from the point A=(−2,1) to the point B=(−4,2) is??