... b, c, d) = (1, 2, 3, 4, 9, 15) h. f (a, b, c, d) = (0, 2, 4, 6, 8) + d(1, 9, 12, 15) 24 . Tỗm tọỳi thióứu hoùa caùc bióứu thổùc sau : a. (0, 2, 3, 5, 6, 7, 11, 12, 13) 4b. (2, 4, 8) + d(0, ... c. f (a, b, c, d) = (1, 2, 4, 9, 11) d. f (a, b, c, d) = (0, 1, 4, 5, 10, 11, 12) + d(3, 8, 14) e. f (a, b, c, d) = (0, 2, 3, 4, 7, 8, 14) f. f (a, b, c, d) = (1, 2, 4, 15) + d(0, 3, 14) g. ... Baỡi tỏỷp Trang 157 d. f (d, e, f) = (1, 2, 3) + d(0, 5, 7) e. f (d, e, f) = (1, 4, 6) + d(0, 2, 7) f. f (p, q, r) = (p + q + r)(p + q + r ) 28 . Tỗm mọỹt bióứu thổùc tọỳi giaớn daỷng...