Definition: In mathematics, a constant is an element that does not change its value. It can be considered as a fundamental concept in calculus and other mathematical disciplines where derivatives play a crucial role. Coinstantaneity means that a mathematical object or function should remain the same regardless of how it is represented or manipulated. In other words, a constant cannot be changed. If you have a function \(f(x)\), and you change its value by multiplying it with some number \(k\), then \(f(k