A function is defined as Is it a bijection or not? In case it is a bijection, find (3).

Given that is defined as Injectivity of f:

Let and be two elements of domain (R),

Such that

So, is one-one.

Surjectivity of f:

Let be in the co-domain (R),

Such that

in R (domain)

is onto.

So, is a bijection and, hence, it is invertible.

Finding :

Let (1)

So, from (1)]