Question

The function f: N->N defined by f (n) = 2n + 3 is​

Answer 1

Answer:

f(n)=2n+3 is a linear function

hence f(n1)=f(n2) =>n1=n2

Here Domain is N but range is set of all odd number −{1,3}

Hence f(n) is injective or one-to-one function.