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Questions  >>  CBSE XII  >>  Math  >>  Model Papers
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If a,b and c are real number and $ \begin{vmatrix} b+c & c+a & a+b \\ c+a & a+b & b+c \\ a+b & b+c & c+a \end{vmatrix} $Show that either \(a+b+c=0 \: or \: a=b=c\)

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