The function is $\"\"$ .

All possible values of $\"\"$ is the domain of the function.

The denominator of the function should not be zero.

So fourth root of the function should be grater than zero.

$\"\"$

If $\"\"$ is negative then the function becomes positive.

So it occurs in cases $\"\"$ and $\"\"$ .

Solve for $\"\"$ .

$\"\"$ and $\"\"$

Solve for $\"\"$ .

$\"\"$ and $\"\"$

Then the domain of the function is $\"\"$ and $\"\"$ . \ \

The domain of the function is $\"\"$ .