In mathematics, a domain refers to the set of possible inputs, or values, for a given function or equation. It represents the values for which the function or equation is defined. For example, if we have the function f(x) = 1/x, the domain is all real numbers except for x = 0, since the function is not defined for dividing by zero. Similarly, for the equation y = √(x + 2), the domain would be all real numbers greater than or equal to -2, since the square root function is not defined for negative values.
