👉 In mathematics, an explicandum is a term used to describe a mathematical object that has no explicit definition or formula. It can be thought of as a placeholder for a symbol or variable in a mathematical expression, without any clear meaning or purpose attached to it. For example, if we have the equation: \[a + b = c\] and we want to express this using only letters and symbols, then we would use an explicandum like "c" instead of "b". In this case
