how to find range of any real function
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there are very long range
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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:
The denominator (bottom) of a fraction cannot be zero
The number under a square root sign must be positive in this section
Example 1a
Here is the graph of \displaystyle{y}=\sqrt{{{x}+{4}}}y=x+4:
12345-1-2-3-4123xy
Domain: \displaystyle{x}\ge-{4}x≥−4
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