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Mathematics
Mathematics
Problem
A
B
C
D
ABCD
A
B
C
D
is a quadrilateral.
E
E
E
is the point of intersection of the line joining the mid-points of the opposite sides. If
O
O
O
is any point and
O
A
+
O
B
+
O
C
+
O
D
=
x
O
E
\mathbf{OA} + \mathbf{OB} + \mathbf{OC} + \mathbf{OD} = x\mathbf{OE}
OA
+
OB
+
OC
+
OD
=
x
OE
, then
x
x
x
is equal to a.
3
3
3
b.
9
9
9
c.
7
7
7
d.
4
4
4
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