NECO Mathematics 2024 Objective — Question 8
Question 8 of 50 from the National Examinations Council (NECO) Mathematics 2024 Objective paper, with the correct answer and a full explanation.
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If log₃(2x−1)=5, find the value of x.
- A. A. 8
- B. B. 16
- C. C. 64
- D. D. 122Correct
Explanation
log₃(2x−1)=5. If logₐa=x, then a=bˣ. As log₃(2x−1)=5, 2x−1=3⁵=243. 2x=244. x=244/2=122.
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