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Evaluate ∫\(^2_1\) \(\frac{5}{x}\) dx

Mathematics
JAMB 2018

Evaluate ∫\(^2_1\) \(\frac{5}{x}\) dx

  • A. 1.47
  • B. 2.67
  • C. 3.23
  • D. 3.47
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Correct Answer: Option D
Explanation

∫\(\frac{5}{x}\) dx = 5 ∫\(\frac{1}{x}\) = 5Inx

  Since the integral of \(\frac{1}{x}\) is Inx

  ∫\(^2\) \(_1\)∫ \(\frac{5}{x}\) dx = 5

  dx = 5 (In<2 – InIn1)

  = 3.4657

  = 3.47

There is an explanation video available below.


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Explanation Video

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