The value of \left| \begin{array}{lll}{a-b} & {b-c} & {c-a} \\ {x-y} & – InterviewSolution

1.	The value of \left\| \begin{array}{lll}{a-b} & {b-c} & {c-a} \\ {x-y} & {y-z} & {z-x} \\ {p-q} & {q-r} & {r-p}\end{array}\right\| is equal to
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