Question 1048488:  Show that the set is infinite by placing it in a one to one correspondence with a proper subset of itself. give the general term of the original set and show its pairing with its proper subset 
{4,16,64,256,1024} 
 Answer by robertb(5830)      (Show Source): 
You can  put this solution on YOUR website! The infinite set would be the set of all positive integers.
 
Its proper subset that would have a one-to-one correspondence with itself is the subset of all powers of 4 (using positive exponents).
 
The one-to-one correspondence is given by the formula  , where n = 1,2,3,4,5,... 
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