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Mathematics
Problem
If
a
a
a
,
b
b
b
,
c
c
c
are sides of a scalene triangle, then the value of
∣
a
b
c
b
c
a
c
a
b
∣
\begin{vmatrix} a & b & c \\ b & c & a \\ c & a & b \end{vmatrix}
a
b
c
b
c
a
c
a
b
is : (1) non-negative (2) negative (3) positive (4) non-positive
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