Выберите функцию убывающую на R:<img src="/close/store/examRes/%7B7A88BBD4-95BB-4C1E-A690-99A7C4A0FF58%7D/21.png" /><img src="/close/store/examRes/%7B7A88BBD4-95BB-4C1E-A690-99A7C4A0FF58%7D/20.png" /><img src="/close/store/examRes/%7B7A88BBD4-95BB-4C1E-A690-99A7C4A0FF58%7D/18.png" /><img src="/close/store/examRes/%7B7A88BBD4-95BB-4C1E-A690-99A7C4A0FF58%7D/19.png" /> <img src="/close/store/examRes/%7B7A88BBD4-95BB-4C1E-A690-99A7C4A0FF58%7D/18.png" />, <img src="/close/store/examRes/%7B7A88BBD4-95BB-4C1E-A690-99A7C4A0FF58%7D/19.png" />, <img src="/close/store/examRes/%7B7A88BBD4-95BB-4C1E-A690-99A7C4A0FF58%7D/20.png" />, <img src="/close/store/examRes/%7B7A88BBD4-95BB-4C1E-A690-99A7C4A0FF58%7D/21.png" />