Compute partial derivatives of polynomial terms in x and y using the power rule.
Computes the partial derivative ∂f/∂x or ∂f/∂y numerically using central differences. When differentiating with respect to x, y is held constant and vice versa. Supports any expression in x and y that the parser can evaluate.
Partial derivative w.r.t. x
∂f/∂x ≈ [f(x+h, y) - f(x-h, y)] / (2h)
It measures the rate of change of a multivariable function with respect to one variable while holding all others constant.
Any expression using x and y with standard operations: +, -, *, /, ^, and functions like sin, cos, exp, ln, sqrt.