Differentiate w.r.t. m
\frac{63\sqrt{m}}{2}
Evaluate
21m^{\frac{3}{2}}
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\frac{3}{2}\times 21m^{\frac{3}{2}-1}
The derivative of ax^{n} is nax^{n-1}.
\frac{63}{2}m^{\frac{3}{2}-1}
Multiply \frac{3}{2} times 21.
\frac{63}{2}\sqrt{m}
Subtract 1 from \frac{3}{2}.
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