(12,11)→ ¬Z; 20

Toán BÁO CÁO TOÁN HỌC FANS AND BUNDLES IN THE GRAPH OF PAIRWISE SUMS AND PRODUCT POTX

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Đáp án tham khảo

11: (12,11)→ ¬z; 20 : (12,20)→ ¬z; 20: (20,19)→ ¬x; 21: (21,20)→ ¬y;