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scoray [572]
3 years ago
15

What is the first derivative of 3\sqrt[3]{x^4}-12\sqrt[3]{x}?

Mathematics
1 answer:
Rainbow [258]3 years ago
8 0
\bf y=3\sqrt[3]{x^4}-12\sqrt[3]{x}\implies y=3x^{\frac{4}{3}}-12x^{\frac{1}{3}}
\\\\\\
\cfrac{dy}{dx}=3\left( \frac{4}{3}x^{\frac{1}{3}} \right)-12\left( \frac{1}{3}x^{-\frac{2}{3}} \right)\implies \cfrac{dy}{dx}=4x^{\frac{1}{3}}-4x^{-\frac{2}{3}}
\\\\\\
\cfrac{dy}{dx}=4\sqrt[3]{x}-\cfrac{4}{\sqrt[3]{x^2}}
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Answer:

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Step-by-step explanation:

The number of beats is proportional to the time of the song.

Convert the time to seconds to avoid recurring decimals.

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Set up a direct proportion using equivalent fractions:

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Answer:

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216÷8=27

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Multiply that by 15 to get how much 15 tickets cost.

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