Q:

Let A,B≠0 and let f:A→B be an onto mapping. Then if A is countable then prove B is countable.

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- November 28th 2008, 10:09 AMjas_viruCountability
Q:

Let A,B≠0 and let f:A→B be an onto mapping. Then if A is countable then prove B is countable. - November 28th 2008, 10:49 AMPlato