JAMB Mathematics 2018 Objective — Question 3
Question 3 of 39 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2018 Objective paper, with the correct answer and a full explanation.
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The binary operations ⊙ and ⊗ over the set of real numbers are defined by a⊙b=ab+b−1 and a⊗b=ab+b−2. Find the value of 3⊗(4⊙5)
- A. 42
- B. 57
- C. 60
- D. 94Correct
Explanation
4⊙5 = 4×5+5−1 = 24. 3⊗24 = 3×24+24−2 = 72+24−2 = 94.
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