Differentiate w.r.t. v
9\sqrt{v}
Evaluate
6v^{1.5}
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1.5\times 6v^{1.5-1}
The derivative of ax^{n} is nax^{n-1}.
9v^{1.5-1}
Multiply 1.5 times 6.
9\sqrt{v}
Subtract 1 from 1.5.
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