## Domain and Range of Radical and Rational Functions

To find the domain of the function, start with the domain of the radical, [7,∞) [ 7, ∞), and see if the value from step 1 is in that domain. Since 7 <8 < ∞ 7 < 8 < ∞, we know that the
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## How to find the domain of a radical function

When radical functions are composed with other functions, determining domain can become more complicated. Example: Finding the Domain of a Radical Function Composed with a Rational Function Find the domain of the function

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## Finding the Domain & Range of Radical Functions

Find the domain of f of x is equal to the principal square root of 2x minus 8. So the domain of a function is just the set of all of the possible valid inputs into the function, or all of the possible values for which the function is defined. And

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