$\"\"$

Let $\"\"$ be one-to-one.

Solve for $\"\"$ as a function of $\"\"$ .

Interchange $\"\"$ and to get $\"\"$ .

Replace $\"\"$ by $\"\"$ .

$\"\"$

Consider a function $\"\"$ .

Let $\"\"$ and solve for $\"\"$ in terms of $\"\"$ .

$\"\"$

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

$\"\"$

Replace $\"\"$ by $\"\"$

$\"\"$

$\"\"$ .