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Mathematics
Mathematics
Problem
Prove that the points
(
a
,
b
+
c
)
,
(
b
,
c
+
a
)
(a, b+c), (b, c+a)
(
a
,
b
+
c
)
,
(
b
,
c
+
a
)
and
(
c
,
a
+
b
)
(c, a+b)
(
c
,
a
+
b
)
are collinear.
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