Why (x, y) cannot be (1,1)?
Given x=1 and y=1
So we have in our equation 1n + 1n = 1
1n = 1 because no matter how many times you multiply 1 by 1 it will always equal 1.
So we end with 1 + 1 = 1
Which means 2 = 1
Which is not true so x cannot equal 1 and y cannot equal 1.