square both sides =)
If n is even, then n=2n' ---> nČ=...2. Prove: for all n ϵ Z, n is odd if and only if nČ is odd.
If n is odd, then n=2n'+1 ---> nČ=...
3. using the definition of equal sets and the definition of subset, prove this
form of DeMorgan's Law:____ _ _
If A and B are sets then AUB=A∩B
This may be all you need eh ?