# Derivative Command

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##### Command Categories (All commands)

Derivative( <Function> )
Returns the derivative of the function with respect to the main variable.
Example: `Derivative(x^3 + x^2 + x)` yields 3x² + 2x + 1.
Derivative( <Function>, <Number> )
Returns the nth derivative of the function with respect to the main variable, whereupon n equals <Number>.
Example: `Derivative(x^3 + x^2 + x, 2)` yields 6x + 2.
Derivative( <Function>, <Variable> )
Returns the partial derivative of the function with respect to the given variable.
Example: `Derivative(x^3 y^2 + y^2 + xy, y)` yields 2x³y + x + 2y.
Derivative( <Function>, <Variable>, <Number> )
Returns the nth partial derivative of the function with respect to the given variable, whereupon n equals <Number>.
Example: `Derivative(x^3 + 3x y, x, 2)` yields 6x.
Derivative( <Curve> )
Returns the derivative of the curve.
Example: `Derivative(Curve(cos(t), t sin(t), t, 0, π))` yields curve x = -sin(t), y = sin(t) + t cos(t).
Note: This only works for parametric curves.
Derivative( <Curve>, <Number> )
Returns the nth derivative of the curve, whereupon n equals <Number>.
Example: `Derivative(Curve(cos(t), t sin(t), t, 0, π), 2)` yields curve x = -cos(t), y = 2cos(t) - t sin(t).
Note: This only works for parametric curves.
Note: You can use `f'(x)` instead of `Derivative(f)`, or `f''(x)` instead of `Derivative(f, 2)`, and so on.

## CAS Syntax

Derivative( <Expression> )
Returns derivative of an expression with respect to the main variable.
Example: `Derivative(x^2)` yields 2x.
Derivative( <Expression>, <Variable> )
Returns derivative of an expression with respect to the given variable.
Example: `Derivative(a x^3, a)` yields .
Derivative( <Expression>, <Variable>, <Number> )
Returns the nth derivative of an expression with respect to the given variable, whereupon n equals <Number>.
Examples:
• `Derivative(y x^3, x, 2)` yields 6xy.
• `Derivative(x³ + 3x y, x, 2)` yields 6x.
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