0 votes 0 votes A $WFF$ that is equivalent to the $WFF$ $x=> y$ is : $y=>x$ ~$y=>x$ ~$y=>$ ~$x$ $y=>$ ~$x$ Others ugcnetcse-dec2007-paper2 + – go_editor asked Mar 28, 2020 • edited Jun 11, 2020 by soujanyareddy13 go_editor 265 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes C is contrapositive of original formula. So C is correct. smsubham answered Apr 1, 2020 smsubham comment Share Follow See all 0 reply Please log in or register to add a comment.