NDerivative Command

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NDerivative( <Function> )
Plots the 1st derivative of the given function, calculated numerically.
Example: NDerivative[x^4+2x^3-2x+1] plots in Graphics View the graph of the function f(x) = 4x³ + 6x² - 2, which is the first derivative of the given function. However, the equation of the plotted function is not shown in Algebra View.
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