Let  defined by f(1) = f(2) = 1 and f(x) = x – 1 for x > 2. Show that f is onto but not one-one.

Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM

Expert Answer:

Here, f(1) = f(2) = 1. So, f is not one-one and for x > 2, every member of co-domain has a pre-image for all the natural numbers, so function is onto.

Answered by  | 4th Jun, 2014, 03:23: PM