The functions and .

Find .

All possible values of  is domain of a function.

Find which number make the fraction undefined, create an equation where the denominator is not equal to zero.

.

Subtract from each side.

The domain of is all real numbers except .

Find .

All possible values of  is domain of a function.

Find which number make the fraction undefined, create an equation where the denominator is not equal to zero.

.

Subtract from each side.

The domain of is all real numbers except .

Find .

Since is a quadratic function, the domain is all real numbers.

Find .

All possible values of  is domain of a function.

Find which number make the fraction undefined, create an equation where the denominator is not equal to zero.

.

The domain of is all real numbers except .

 and the domain is all real numbers except .

 and the domain is all real numbers except .

 and the domain is all real numbers.

 and the domain is all real numbers except .