Differentiate $f (x) = 4 x^{2} - 5 x$

8 x

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8 x - 5

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5

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None of these

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Solution

The correct option is B $8 x - 5$
Given $f (x) = 4 x^{2} - 5 x$
differentiate both sides wrt $x$
$f^{'} (x) = \frac{d f (x)}{d x}$
$∴ f^{'} (x) = 8 x - 5$ $∵ \frac{d}{d x} x^{n} = n x^{n - 1}$

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Similar questions

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lim x \to \frac{1}{2} \frac{4 x^{2} + 8 x - 5}{1 - 4 x^{2}}

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\int \sqrt{4 + 8 x - 5 x^{2}} d x = \sqrt{5} [\frac{5 x - 4}{10 \sqrt{(5)}} \sqrt{4 + 8 x - 5 x^{2}} + \frac{18}{25} {sin}^{- 1} \frac{5 x - 4}{6}] .

\int_{0}^{3}

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