👉 Substitutive in mathematics refers to a function that can be defined using only one variable, without changing its value. This is often used in algebra and calculus, where functions are defined by substituting specific values for the variable.
For example, consider the function f(x) = x^2 - 3x + 4. If we substitute x = 1 into this function, we get f(1) = (1)^2 - 3
1 + 4 = 1