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JAMB Mathematics 2008 Objective — Question 16

Question 16 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2008 Objective paper, with the correct answer and a full explanation.

If p varies inversely as the square of q and p=8 when q=4, find q when p=32

A. ±16
B. ±8
C. ±4
D. ±2Correct

Explanation

p=k/q^2. 8=k/16. k=128. When p=32: 32=128/q^2. q^2=4. q=±2.

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