Learn how to find the domain of a radical function

The video tutorial explains the concept of square roots and why they cannot be taken from negative numbers. It demonstrates solving inequalities involving square roots and discusses the domain of functions with square roots. The tutorial also covers how the presence of square roots in denominators affects the domain of a function.

What must be true about the expression under a square root in a function?

• It must be less than zero.

• It must be non-negative.

• It must be greater than zero.

• It can be any real number.

What is the range of values that T can take in the function discussed?

• From zero to five, inclusive.

• From zero to infinity.

• From negative infinity to five, inclusive.

• From negative infinity to zero, inclusive.

Why can the value five be included in the domain of the function?

• Because it results in a positive number.

• Because it results in a negative number.

• Because it is greater than five.

• Because it results in zero, which is acceptable.

What happens to the domain if the expression is in the denominator?

• The domain remains unchanged.

• Zero can be in the denominator.

• The domain becomes all real numbers.

• Zero cannot be in the denominator.

How does placing the expression in the denominator affect the function?

• It makes the function undefined.

• It restricts T to positive values only.

• It allows any value for T.

• It prevents zero from being in the denominator.