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6. (4 pts) Determine the truth value of each of the following statements if the universe of discourse of each variable consists of all real

6. (4 pts) Determine the truth value of each of the following statements if the universe of discourse of each variable consists of all real numbers. (a) xy(x+y=1) (b) xy(x+2y=22x+4y=5) (c) xy(x+y=22xy=1) (d) xyz(z=(x+y)/2)

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