Differentiate w.r.t. b
8b^{3}
Evaluate
2b^{4}
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4\times 2b^{4-1}
The derivative of ax^{n} is nax^{n-1}.
8b^{4-1}
Multiply 4 times 2.
8b^{3}
Subtract 1 from 4.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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