Implement ABC'D' using only one 2-input nand gate and one 3-input nor gate

[nicnick77]

Homework Statement

How do I implement ABC'D' using only one 2-input nand gate and one 3-input nor gate?

Homework Equations

The Attempt at a Solution

 

[LCKurtz]

Homework Statement

How do I implement ABC'D' using only one 2-input nand gate and one 3-input nor gate?

Homework Equations

The Attempt at a Solution

I assume you have A,B,C,D as inputs. My hint would be to start by writing it as$$
\overline{(\bar A+\bar B)}(\bar C)(\bar D)$$

 

[nicnick77]

Thks for your help LCKurtz,

I am able to solve the problem after your advice...