state gov UP Police Computer Operator Grade A Mock Test 2023 Digital Logic Number Representations and Computer Arithmetic Minimization of Boolean Expression
Which of the following is valid for Boolean algebra but NOT for ordinary algebra?
1
X. (Y + Z) = (X.Y) + (X.Z)
2
X + (Y.Z) = (X + Y).(X + Z)
3
X + Y = Y + X
4
X.Y = Y.X