
Step-by-step explanation:

<em>We change the argument and the value:</em>

<em>Divide both parts of the equation by 2:</em>

<em>The restrictions are imposed on the inverse function by on x:</em>

<em>The restrictions are imposed on the inverse function by on y:</em>

<em>Then the original function is defined on the sets:</em>

<em>The initial function, a parabola, is constrained because of the inverse function; only in this case the functions are reciprocal.</em>