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CBSE Class 12-science Answered

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 | 04 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 | 04 Jun, 2014, 03:23: PM
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