P q r )( p q r
- p u2192 q u2192 r u2261 p u2227 q u2192 r
- p u2192 q u2192 r and p u2192 q u2192 r are logically equivalent
- p u2192 q u2228 r u2261 p u2227 q u2192 r
- if p q q r r p
- p q r 2 p q r 2
- p u2192 q u2192 r ) u2194 ( p u2227 q u2192 r
- ( p u2228 q u2192 r u2228 ( p u2228 q u2227 r
- show that p q r )u003d( p q r
- p q r )( p q r )+ pq qr
- p q r p q r
