Question

Add a+b-1,- b- a+ 1, 1 -2​

Answer 1

Write proper and complete question

Answer 2

Answer:

LHS

= (A+A'B)'

= (A'.(A'B)')

= (A'.(A+B')) // again applied de-morgan's law in previous step

= (A'.A+A'B')

= A'B'

also apply De-morgans on RHS

(A+B)'

= A'B'