Evaluate
27\left(cd\right)^{\frac{3}{4}}
Differentiate w.r.t. c
\frac{81d}{4\sqrt[4]{cd}}
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81^{\frac{3}{4}}c^{\frac{3}{4}}d^{\frac{3}{4}}
Expand \left(81cd\right)^{\frac{3}{4}}.
27c^{\frac{3}{4}}d^{\frac{3}{4}}
Calculate 81 to the power of \frac{3}{4} and get 27.
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