How to write the domain of a rational function with a radical in denominator

The video tutorial explains the importance of ensuring the denominator in a function is not zero and discusses the special case of square roots, where the input cannot be negative. It highlights that for a function involving a square root in the denominator, the expression must be greater than zero. The tutorial provides examples to illustrate these concepts and clarifies the domain of square root functions, emphasizing that the domain includes all positive numbers and zero, except when the square root is in the denominator.

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