Plz help solving these:
(a) Assume that and are positive integers and that . Prove that if , then using contrapositive method.
(b) Using direct proof show that the negative of any even integer is even.
Thnx in advance..
by the contrapositive method, we prove a statement by showing
so start by assuming , where does this get you? how does this cause to relate to ? will they be equal?
Hint: we say an integer is even if it can be expressed as for . now note that(b) Using direct proof show that the negative of any even integer is even.