JAMB Mathematics 2019 Objective — Question 20
Question 20 of 40 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2019 Objective paper, with the correct answer and a full explanation.
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Find the value of x for which 2(3^(2x-1)) = 162
- A. 1/2
- B. 5/2Correct
- C. 3/2
- D. 5/4
Explanation
3^(2x−1) = 162/2 = 81 = 3⁴. So 2x−1=4 ⇒ 2x=5 ⇒ x=5/2.
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