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Given that \(\frac{\mathrm d y}{\mathrm d x} = \sqrt{x}\), find y.

Further Mathematics
WAEC 2013

Given that \(\frac{\mathrm d y}{\mathrm d x} = \sqrt{x}\), find y.

  • A. \(2x^{\frac{3}{2}} + c\)
  • B. \(\frac{2}{3}x^{\frac{3}{2}} + c\)
  • C. \(\frac{3}{2}x^{\frac{3}{2}} + c\)
  • D. \(\frac{2}{3}x^{2} + c\)
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Correct Answer: Option B
Explanation

\(\frac{\mathrm d y}{\mathrm d x} = \sqrt{x} = x^{\frac{1}{2}}\)

\(y = \int x^{\frac{1}{2}} \mathrm {d} x\)

= \(\frac{x^{\frac{1}{2} + 1}}{\frac{1}{2} + 1} + c = \frac{x^{\frac{3}{2}}}{\frac{3}{2}} + c \)

= \(\frac{2}{3}x^{\frac{3}{2}} + c\)


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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
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