Using the contra positive method prove that if n2 is an even integer, then n is also an even integer.
Let us consider that,
p: n2 is an even integer
-p: n is not an even integer
Q: n is also an even integer
-q: n is not an even integer.
A conditional statement is said to be logically equivalent to its contrapositive.
Thus, If n is not an even integer, then is not an even integer.
Thus, are true.