JAMB Mathematics 2023 Objective — Question 37
Question 37 of 40 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2023 Objective paper, with the correct answer and a full explanation.
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If n + 1/n = 9, evaluate n² + 1/n².
- A. 63
- B. 81
- C. 79Correct
- D. 38
Explanation
(n+1/n)²=81=n²+2+1/n² ⇒ n²+1/n²=79.
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