WAEC Mathematics 2020 Objective — Question 5
Question 5 of 50 from the West African Examinations Council (WAEC) Mathematics 2020 Objective paper, with the correct answer and a full explanation.
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Express 1 + 2log10 3 in the form log10 q.
- A. log10 90Correct
- B. log10 19
- C. log10 9
- D. log10 6
Explanation
1 + 2log10 3 = log10 10 + log10 3^2 = log10 10 + log10 9 = log10(10x9) = log10 90.
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