1.
ABCDEF is a regular hexagon, with centre O.
= a ,
= b.
OA
OB
(a) Write the vector
in terms of a and b.
AB
.....................................
(1)
The line AB is extended to the point K so that AB : BK = 1 : 2
(b) Write the vector
in terms of a and b.
CK
Give your answer in its simplest form.
.....................................
(3)
(4 marks)