Question

derived a Boolean function from given diagram​

Answer 1

Expression:  

(A.B') +(C' +D)

Explanation:  

• ' represent NOT gate:  Returns not value when applied on the operand.

• + represents OR gate: OR gate returns True value when either of the input values or both input values if True.

• * represents AND gate: AND gate returns True value when both of the entered values are True.

Using the explanation above,

The expression we get is  (A.B') +(C' +D)