Решите неравенство (x-1)(3x-5)<1
3х²-5х-3х+5 < 1 3х²-8х+5 < 1 D = 64 - 4 • 5 • 3 = 4 = 2² x1 = 8 - 2 / 6 = 1 x2 = 8 + 2 / 6 = 10/6 = 5/3 = 1 2/3 (x - 1)(x - 1 2/3) < 0 ______o(1)_______o(1 2/3)______> Ответ: (1; 1 2/3)