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why cant it be 4?

output of one nand is ab complement

output of another one cd complement

these both given to a nand gate to give abcd complement cpmplement => abcd

now give to another nand => abcd complement

therefore 4 nand gates right

why cant it be 4?

output of one nand is ab complement

output of another one cd complement

these both given to a nand gate to give abcd complement cpmplement => abcd

now give to another nand => abcd complement

therefore 4 nand gates right

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