MAA 3200 Midterm: MAA 3200 FIU Exam 1
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Show all your work and explain your reasoning. Don"t use your own paper, a calculator or book. You may ask for extra paper or for clari cations. Assume the universal set is r except that in 3b and 5 it is n = {0, 1, 2, : [15pts] use truth tables to determine which statements are tautologies, contradictions or neither. 1: [15pts] one of these is false. As in the hw, you may assume a similar equivalence involving and . 5)[15pts] prove that x is even if and only if x2 is even: [20pts] answer true or false: you don"t have to explain. X > 0, !y > 0, x 2y = 0. If a c b then a b c. If a < b and ac bc then c < 0. X 0, y 0, x + y = 0.
