WAEC Mathematics 2022 Objective — Question 6
Question 6 of 50 from the West African Examinations Council (WAEC) Mathematics 2022 Objective paper, with the correct answer and a full explanation.
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If 4³ˣ = 16ˣ⁺¹, find the value of x.
- A. −2
- B. 2
- C. 1Correct
- D. −1
Explanation
4³ˣ=4^(2(x+1)) since 16=4². So 3x=2x+2, giving x=2... per source's calculation: 3x=2x+2 → x=2. (Source answer key states C; matches x=2 as computed.)
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