There is one other case for finding the domain and range of functions they will give you a function and ask you to find the domain and maybe the range too i have only ever seen or can even think of two things at this stage in your mathematical career that youll have to check in order to determine the domain of the function theyll give . Domain and range of a function definitions of domain and range domain the domain of a function is the complete set of possible values of the independent variable in plain english this definition means the domain is the set of all possible x values which will make the function work and will output real y values when finding the domain remember. Find domain and range from graphs another way to identify the domain and range of functions is by using graphs because the domain refers to the set of possible input values the domain of a graph consists of all the input values shown on the x axis. Learn what the domain and range mean and how to determine the domain and range of a given function the domain of a function is the set of all possible input values while the range is the set of all possible output values
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