Value of $\begin{vmatrix}a-b&b-c&c-a\\b-c&c-a&a-b\\c-a&a-b&b-c\end{vmatrix}=$
Answer & explanation
Correct answer: option 1
$Δ=\begin{vmatrix}a-b&b-c&c-a\\b-c&c-a&a-b\\c-a&a-b&b-c\end{vmatrix}$
Operation $C_1→C_1+C_2+C_3$
$Δ=\begin{vmatrix}0&b-c&c-a\\0&c-a&a-b\\0&a-b&b-c\end{vmatrix}$
$⇒Δ=0$