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Integrate \(\frac{1 - x}{x^3}\) with respect to x

Mathematics
JAMB 1993

Integrate \(\frac{1 - x}{x^3}\) with respect to x
  • A. \(\frac{x - x^2}{x^4}\) + k
  • B. \(\frac{4}{x^4} - \frac{3 + k}{x^3}\)
  • C. \(\frac{1}{x} - \frac{1}{2x^2}\) + k
  • D. \(\frac{1}{3x^2} - \frac{1}{2x}\) + k
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Correct Answer: Option C
Explanation
\(\int \frac{1 - x}{x^3}\)

= \(\int^{1}_{x^3} - \int^{x}_{x^3}\)

= x-3 dx - x-2dx

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

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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
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