It is a real function of two real variables.
A real function of two variables is created through menu Calculus - New real calculation - Real function of two variables.
Such a function may be modified through icon .
For example,you can define a real function of two variables by f(x, y) = 2x²y+ 3x + y + 1. Enter f for the name, x and y for the variables names and 2x^2*y+ 3*x + y + 1 for formula.
See also : Real calculus syntax.
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