The circuit is equivalent to

Step-by-step solution

The gate circuit can be shown by giving two inputs A and B . Output of NOR gate, Y₁= A+B Output of NAND gate, aligned Y₂ & = Y₁ Y₁ & = A+B A+B & = A+B + A+B & =(A+B)+(A+B) & =A+B aligned Output of NOT gate, aligned Y & = Y₂ & = A+B aligned which is the output of NOR gate. Altemative : Same as NOR Gate NOR Gate array lll 0 & 0 & 1 0 & 1 & 0 1 & 0 & 0 1 & 1 & 0 array Note : NOR and NAND gates are said to be universal building blocks.