Jawaban T.63.1.

\(N(0,0)=\{-1,0,1\}^2\text{,}\) \(N(1,1)=\{(1,1)\}\text{,}\) \(N(0,1)=\{-1,0,1\}\times\{1\}\text{,}\) dan \(N(1,0)=\{1\}\times\{-1,0,1\}\text{.}\)
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