the domain is when the denominator of the problem is set to zero... but i am not sure how to find the range
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the domain is all real numbers the range is from -1 to +1
Use the function to find the image of each point in the domain. The set of values that you get will be the range. If the function is well behaved, you will not have to try each and every value in the domain.
The domain is, but the range need not be.
Any function is a mapping from a domain to a codomain or range. Each element of the domain is mapped on to a unique element in the range by the function.
Domain: All Possible "x" values Range: All possible "y" values