If the point A=(−2,3) and the point B=(−3,−1), find?
A unit vector in the direction of AB (AB has vector arrow above it).
The vector AB is -1i + -4j, I don't understand how 2(AB) = -2i + -8j isn't in the same direction! I tried 2(AB) and the online homework program didn't accept it.
Explanation gets 10 points.
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Why you want to go for 2(AB) whwn you want unit vector ?
It is simply vector with magnitude 1.
Unit vector here is, -1/root17 i + -4/root17 j