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JAMB Mathematics 2019 Paper

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Question : 24

Total: 73

If

y = 6x^3 + 2x^{-2} - x^{-3}

\frac{dy}{dx}

.

$\frac{dy}{dx} = 15x^2 - 4x^{-2} - 3x^{-2}$
$\frac{dy}{dx} = 6x + 4x^{-1} - 3x^{-4}$
$\frac{dy}{dx} = 18x^2 - 4x^{-3} + 3x^{-4}$
$\frac{dy}{dx} = 12x^2 + 4x^{-1} - 3x^{-2}$

Solution:

$y = 6x^3 + 2x^{-2} - x^{-3}$

$\frac{dy}{dx} = 18x^2 - 4x^{-3} + 3x^{-4}$

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