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1993 AMC 12 #1 - Special Operation

Source:

January 2, 2012
AMC

Problem Statement

For integers a,ba, b and cc, define a,b,c\boxed{a, b, c} to mean ab−bc+caa^b-b^c+c^a. Then 1,−1,2\boxed{1, -1, 2} equals
<spanclass=′latex−bold′>(A)</span> −4<spanclass=′latex−bold′>(B)</span> −2<spanclass=′latex−bold′>(C)</span> 0<spanclass=′latex−bold′>(D)</span> 2<spanclass=′latex−bold′>(E)</span> 4 <span class='latex-bold'>(A)</span>\ -4 \qquad<span class='latex-bold'>(B)</span>\ -2 \qquad<span class='latex-bold'>(C)</span>\ 0 \qquad<span class='latex-bold'>(D)</span>\ 2 \qquad<span class='latex-bold'>(E)</span>\ 4
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