If y = (5 - x)\(^{-3}\), and \(\frac{dy}{dx}\)
FURTHER MATHEMATICS
WAEC 2019
If y = (5 - x)\(^{-3}\), and \(\frac{dy}{dx}\)
- A. \(\frac{-15}{(5 - x)^4}\)
- B. \(\frac{-3}{(5 - x)^4}\)
- C. \(\frac{3}{(5 - x)^4}\)
- D. \(\frac{15}{(5 - x)^4}\)
Correct Answer: B. \(\frac{-3}{(5 - x)^4}\)
Explanation
y = (5 - x)\(^{-3}\)
\(\frac{dy}{dx}\) = -3(5 - x)\(^{-4}\)
= \(\frac{-3}{(5 - x)^4}\)
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