In: Advanced Math
Using field axioms, prove the following theorems:
(i) If x and y are non-zero real numbers, then xy does not equal 0
(ii) Let x and y be real numbers. Prove the following statements
1. (-1)x = -x
2. (-x)y = -(xy)=x(-y)
3. (-x)(-y) = xy
(iii) Let a and b be real numbers, and x and y be non-zero real numbers. Then a/x + b/y = (ay +bx)/(xy)