Hi do the following sets have the same cardinality, why or why not?
N= 1,2,3,4,5,6,7...
N-2= blank, blank, 3,4,5,6,7...
So basically the numbers from 3 to 7 match up in both sets, but in N-2 the first two are empty. I think they have the same cardinality but I don't know how to prove it. Please help this is due tommorow and it's my last problem.
2 answers