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3a4
OAB is a triangle and OBC is a straight line.
OA = 4a
N is the midpoint of AB.
MA
OB = 2b
N
BC = b
OM = 3a
2b
B
b С
a) Work out MN in terms of a and b. b) Show that M, N and Clie
Simplify your answer.
on a straight line.
Note: Ignore arrows above vectors eg write MN, not MN
MN= MA + AN a + AB2
+
+
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