Question: Prove Theorem 3.2(a)(d). a. A + B = B + A b. (A + B) + C = A + (B + C) c. A

Prove Theorem 3.2(a)–(d).

a. A + B = B + A
b. (A + B) + C = A + (B + C)
c. A + O = A
d. A + (-A) = O

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