Sat July 16, 2011 By: Nimisha Menon

could you tell me what an onto function is in simple words? i saw the video but i still have not understood it properly. Thanks a lot Yours sincerely Nimisha Menon

Expert Reply
Sat July 16, 2011
The defination of an onto function is:A function f:X?Y is said to be an onto function if for every
yY,there exists an elemeny xX,such that f(x)=y.
In simple words,we can say if every element of Y is the image of some element of X under f, then function is onto.
Morever, f:X?Y is onto iff Range f=Y.
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