\"\"

\

(a)

\

The function is \"\".

\

Definition of the inverse hyperbolic function \"\".

\

\"\"

\

\"\".

\

\"\"

\

(b)

\

The function is \"\".

\

Definition of the inverse hyperbolic function  \"\".

\

\"\"

\

\"\"

\

\"\".

\

\"\"

\

(a) \"\".

\

(b) \"\".