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2. Below you will fine pairs of statements A and B. For each pair, please indicate...

2. Below you will fine pairs of statements A and B. For each pair, please indicate which of the following three sentences are true and which are false:

· If A, then B.

· If B, then A.

· A if and only if B.

a. A: x > 0. B: x2 > 0.

b. A: x < 0. B: x3 < 0.

c. A: xy = 0. B: x = 0 or B = 0.

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