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How to find a function is into or into ? I always have a problem in that.

How to find a function is into or into ?
I always have a problem in that. 
 

Grade:12

1 Answers

Jitender Singh IIT Delhi
askIITians Faculty 158 Points
9 years ago
f:A\rightarrow B
A = Domain
B = Co-domain
There is basically only one difference b/w onto & into function;
If Range of the function is equal to co-domain, then function f is onto.
If range is proper set of co-domain, then function f is into.
Thanks & Regards
Jitender Singh
IIT Delhi
askIITians Faculty

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