Question: 18. If set A= {1,4,5,6,8,}, B = {4,5,7,9,10,11} and U = {1,2,3,4,5,6,7,8,9,10}. Calculate A-B and AUB 19. Let f be the function from {a, b,

18. If set A= {1,4,5,6,8,}, B = {4,5,7,9,10,11} and U = {1,2,3,4,5,6,7,8,9,10}. Calculate A-B and AUB 19. Let f be the function from {a, b, c, d} to {1, 2, 3} defined by f(a) = 3, f(b) = 2, f(c) = 1, and f(d) = 3. Is f an on-to function or one to one function

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