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Mathematics
Mathematics
Problem
The plane
a
x
+
b
y
+
c
z
=
1
ax + by + cz = 1
a
x
+
b
y
+
cz
=
1
meets the co-ordinate axes in
A
A
A
,
B
B
B
and
C
C
C
. The centroid of the triangle is
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