Page 282 - MATHEMATICS COURSE FOR SECONDARY SCHOOLS BOOK 2

STARTING POINT OF A VECTOR
The starting point of a vector can be obtained from a graph by reversing the distance of the vector.
EXAMPLE 7
(a) AB =(74 ) has an end point B (9, 5), find the coordinates of its starting point A.
(a) If AB =
(b) If PQ =
(-5) -3
(b) PQ =
determine the coordinates of its starting point P.
(x ) –AB = - (xy ).
has an end point Q (-8, 4),
, then –AB = BA = (-4) (74 ) -7
, then –PQ = QP =
(-5) (5 ) -3 3
If AB = y , then the reverse vector is
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