Which of the following binary operations is cumulative on the set of integers?
MATHEMATICS
JAMB 1995
Which of the following binary operations is cumulative on the set of integers?
- A. a ∗ b = a + 2b
- B. a ∗ b = a + b - ab
- C. a ∗ b = a2 + b
- D. a \(\ast\) b = \(\frac{a(b + 1)}{2}\)
Correct Answer: B. a ∗ b = a + b - ab
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