Logic Expression 1.2

Ask

The logic function;f =$\overline{[(x.\overline{y})+(\overline{x}.y)]}$is equivalent to

(a)$f=(x+y)(\overline{x}+\overline{y})$

(b)$f=\overline{[(\overline{x}+\overline{y})+(x+y)]}$

(c)xy

(d)none of above

Answer is (d) x xnor y 

Concept