��.16.11 �� 9 �� (��)

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$�� 16.11. �� :�) {x-y?1, 2x-y?3}; �) {x-y?2, 3x-y?1};�) {x^2+y1}; �) {y-vx?0, x-2y?1};�) {xy?4, y-x?1}; �) {x^2+(y-1)^2?4,...$

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16.11. �� :

�) {x-y?1, 2x-y?3}; �) {x-y?2, 3x-y?1};

�) {x^2+y < 0, 2x-y > 1}; �) {y-vx?0, x-2y?1};

�) {xy?4, y-x?1}; �) {x^2+(y-1)^2?4, y-|x|?1}.

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