Problems
Problem 2.1
(a) Prove T9(b).

(b) Prove T10 : (a) and (b) by completing the truth tables below :

0 0 0 1 1 0 1 1
0 1 1 0 0 0 1 1
1 0 0 1 1 0 1 1
1 1 0 0 1 0 0 1


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