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Make x the subject of the relation d = \(\sqrt{\frac{6}{x} - \frac{y}{2}}\)

Mathematics
WAEC 2017

Make x the subject of the relation d = \(\sqrt{\frac{6}{x} - \frac{y}{2}}\)

  • A. x = \(\frac{6 + 12}{d^2 + y}\)
  • B. x = \(\frac{12}{d^2 - y}\)
  • C. x = \(\frac{12}{y} - 2d^2\)
  • D. x = \(\frac{12}{2d^2 + y}\)
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Correct Answer: Option D
Explanation

d = \(\sqrt{\frac{6}{x} - \frac{y}{2}}\)

\(d^2 = \frac{6}{x} - \frac{y}{2}\)

\(2xd^2 = 12 - xy\)

\(2xd^2 + xy = 12\)

x = \(\frac{12}{2d^2 + y}\)


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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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