Differentiate w.r.t. x_4
-\frac{128}{x_{4}^{2}}
Evaluate
\frac{128}{x_{4}}
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-128x_{4}^{-1-1}
The derivative of ax^{n} is nax^{n-1}.
-128x_{4}^{-2}
Subtract 1 from -1.
Examples
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Limits
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