Differentiate w.r.t. f
\frac{4f}{3}
Evaluate
\frac{2f^{2}}{3}
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2\times \frac{2}{3}f^{2-1}
The derivative of ax^{n} is nax^{n-1}.
\frac{4}{3}f^{2-1}
Multiply 2 times \frac{2}{3}.
\frac{4}{3}f^{1}
Subtract 1 from 2.
\frac{4}{3}f
For any term t, t^{1}=t.
f^{2}\times \frac{2}{3}
Reduce the fraction \frac{4}{6} to lowest terms by extracting and canceling out 2.
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