👉 A discontinuer is a type of mathematical function that behaves differently at different points. It is used in calculus to represent functions whose behavior changes abruptly as they approach or leave certain values, such as infinity or zero. For example, consider the function f(x) = x^2 - 4x + 3. As we approach or leave the point (0, 1), the value of f(x) will change from positive to negative. This is a discontinuer because its behavior changes at