Step 1:

(a)

The function is .

Find the restricted domain value.

Domain is defined as the eliminate the zeros of the denominator of the function,

then the domain is .

Since, Here the functtion is shows numerator is greater than the denominator, then

solve the function function to find the domain.

Therefore, the function is touches the axis at .

Thus, the restricted domain .

(b)

Simplify the function.

The simplified function is .

(c)

Graph the function .

Solution:

(a) The restricted domain value is .

(b) The simplified function is .

(c)