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Q. |
“The product of two negative real numbers is not negative.” Is given by? |
A. | ∃x ∀y ((x < 0) ∧ (y < 0) → (xy > 0)) |
B. | ∃x ∃y ((x < 0) ∧ (y < 0) ∧ (xy > 0)) |
C. | ∀x ∃y ((x < 0) ∧ (y < 0) ∧ (xy > 0)) |
D. | ∀x ∀y ((x < 0) ∧ (y < 0) → (xy > 0)) |
Answer» D. ∀x ∀y ((x < 0) ∧ (y < 0) → (xy > 0)) |
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