Критерий Ван-дер-Вардена:<img src="/close/store/examRes/%7BD2ACC2C4-52A9-4769-850A-0C83370456F3%7D/54.bmp" /><img src="/close/store/examRes/%7BD2ACC2C4-52A9-4769-850A-0C83370456F3%7D/55.bmp" /><img src="/close/store/examRes/%7BD2ACC2C4-52A9-4769-850A-0C83370456F3%7D/56.bmp" /><img src="/close/store/examRes/%7BD2ACC2C4-52A9-4769-850A-0C83370456F3%7D/53.bmp" /> <img src="/img/21/1382c3825a7e5d86bbb854c15a.bmp" />, <img src="/img/00/222e95f6857c09f0e4e48eb092.bmp" />, <img src="/img/bd/0170cc2f8df4811d9260877c73.bmp" />, <img src="/img/48/f7cc416a39ba4529a8fe0eb056.bmp" />