Please Solve RD Sharma Class 12 Chapter Function Exercise 2.4 Question 19 Maths Textbook Solution.
Bijection function should fulfil the injection and surjection condition.
Injectivity: let and , such that
So, is an injection.
Surjectivity: let , then
is real for all
is a surjection.
is a bijection. Hence, is invertible.
Squaring on both sides