Explain solution RD Sharma Class 12 Chapter Functions Exercise 2.2 Question 11 maths textbook solution.
Hint : Onto functions means every range has some preimage in the domain of function.
We will first show that f is not onto
Checking f is not onto
But 0 is not a natural number
f is not onto.
Here, y is a natural number. As
So, x is also a natural number.
Hence, is onto.