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Evaluate
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Differentiate w.r.t. x
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-\frac{2}{3}x^{5}x^{9}
Divide -8x^{5} by 12 to get -\frac{2}{3}x^{5}.
-\frac{2}{3}x^{14}
To multiply powers of the same base, add their exponents. Add 5 and 9 to get 14.
\frac{\mathrm{d}}{\mathrm{d}x}(-\frac{2}{3}x^{5}x^{9})
Divide -8x^{5} by 12 to get -\frac{2}{3}x^{5}.
\frac{\mathrm{d}}{\mathrm{d}x}(-\frac{2}{3}x^{14})
To multiply powers of the same base, add their exponents. Add 5 and 9 to get 14.
14\left(-\frac{2}{3}\right)x^{14-1}
The derivative of ax^{n} is nax^{n-1}.
-\frac{28}{3}x^{14-1}
Multiply 14 times -\frac{2}{3}.
-\frac{28}{3}x^{13}
Subtract 1 from 14.