I didn't want to resist the following solution. Again let ; suppose is an integer.
Each term in expasion of is an integer except for , but then cannot be an integer.
I didn't want to resist the following solution. Again let ; suppose is an integer.
Each term in expasion of is an integer except for , but then cannot be an integer.
This is basically the very same nice solution you first posted, but with the conclusion shown in a slightly different way.