Given points A 1 7 and 57 7 write the vector AB vector in th
Given points A (-1, 7) and 5(-7, -7), write the vector AB vector in the I. j form.
Solution
Find a and b by subtracting the x and y values for the terminal point minus the initial point
write v in the form ai + bj
For A ( -1 , 7) , B( -7 , - 7 )
then
a = - 7 - ( -1 ) ==> - 7 + 1 ==> -6
b = - 7 - ( 7 ) ==>- 7 - 7 ===> -14
therefore v in i, j is
AB is ===> - 6 i - 14 j
