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Неравенства ...Решаем задание С3 методом рационализации. 2013
https://drive.google.com/file/d/0B2RDrG0rMlaEVm5pdnozTHpvUk0/view?resourcekey=0-oJPA5w5Lc_WR7Oq6TNsNzA
https://drive.google.com/file/d/0B2RDrG0rMlaEVm5pdnozTHpvUk0/view?resourcekey=0-oJPA5w5Lc_WR7Oq6TNsNzA