Use use an element argument to prove the state (a-b)u(anb) = a" is true. he statement "for all sets a and b,

Answer with Step-by-step explanation:

We have to prove that

is true for all sets A and B

Let

Then or

and or

Hence,

Conversely ,Let

Then x belongs to A and x does not belongs to B then

x belongs to A- B

Or  x belongs to A and x belongs to B then x belongs to

Hence,

Therefore,