Evaluate
\frac{1}{3b}
Differentiate w.r.t. b
-\frac{1}{3b^{2}}
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3^{-1}b^{-1}
Expand \left(3b\right)^{-1}.
\frac{1}{3}b^{-1}
Calculate 3 to the power of -1 and get \frac{1}{3}.
\frac{\mathrm{d}}{\mathrm{d}b}(3^{-1}b^{-1})
Expand \left(3b\right)^{-1}.
\frac{\mathrm{d}}{\mathrm{d}b}(\frac{1}{3}b^{-1})
Calculate 3 to the power of -1 and get \frac{1}{3}.
-\frac{1}{3}b^{-1-1}
The derivative of ax^{n} is nax^{n-1}.
-\frac{1}{3}b^{-2}
Subtract 1 from -1.
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