WAEC Mathematics 2019 Objective — Question 7
Question 7 of 145 from the West African Examinations Council (WAEC) Mathematics 2019 Objective paper, with the correct answer and a full explanation.
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7. Evaluate (log₉₃ − log₈₃)/log₉₃.
- A. -1/3
- B. 1/2
- C. 3/2
- D. -1/2Correct
Explanation
(log₃³ − log₂³)/log₃⁹ = (2log₃−3log₂)/(2log₃) [using logₓₓ=1]. Substituting and simplifying gives (2×1−3)/2 = −1/2.
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