23Functions: Domains and Ranges

Find a function and its domain based on the equation of a curve. De ne the range of a given function. ... called the range of f(x). Example 4 Find the ranges of the following functions. (a) f(x) = x. The domain is R i.e. all numbers and the range is also R. (b) f(x) = x2. The domain is once again R, but the range is all positive numbers as x2 0 ... ................
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