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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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WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709