Find Boolean Equation and Truth Table from Logic Diagram 

You are indeed correct...... my bad.... thanks for pointing it out ..... however, in this case, it does not change the answer because all it does... is add C' to the AxA' term ..... and AxA'xC' is still zero... best wishes 😊

@@StephenMendes thank you for your kind reply, same to you yoo :)

C + C' = 1 only when the letters match.... in the above example the C' is ATTACHED to AB' and the C is not therefore you cannot use that rule

There is a COMPOUND rule that allows you to remove the c' ..... and I not only gave it to you in another video, but I actually provided the proof by breaking it down using the simple basic steps.......so here is the compound rule ..... A +A'B = A + B .... (note A' gone .. for good 😁)..... here is the proof ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-vSH5eusYiVg.html

@@StephenMendes thanks alot god bless you

I have video for that too .... here is the link.... ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-cElozbxsaGo.html

If it has in Flip-Flops then I have videos for that also.... in my Playlist named "ELET1215 - Digital Electronics 2 - MSI & Asynchronous Logic"

C + not C becomes 1 and B + not B becomes 1 ..... does not matter what letter we use 😁

​@@StephenMendesthe fact you're responding to over a year old video is amazing❤

@@tonzaifavour I try to respond to all questions on all my videos ..... does not matter how old they are .... I would not be able to do this if my channel had 100K subscribers with loads of comments each day .... but it's small enough that I can still handle all the comments that come in each day 👍

I don't know what the problem is ? ..... so I cannot know whether I can help or not 🙂

huh ?

Sorry for that 😊

oh really ? ..... well teach us then 🙂..... exactly where in the video is the error ? ..... and do show us the "proper" way 😁

I suggest you also build the circuit and prove your truth table when you are done ..... cause what I have shown in video is 100% correct

@@StephenMendes I might be wrong but I think (AB + C)' = (A'+B') * C' . You somehow got A' + B'C'. I don't understand what you did. (prime means there is a bar)

answer is: a' +b

​@@StephenMendesaccording to Truth table you can not say a`+ab=a`+b

@@MalekaParvin-z4k It is YOU who do not understand .... both sides of the above equality have the identical truth table .... IF you know how to "find a truth table from an expression" ? ..... so there must be a flaw in your understanding of that

What did you do with c bar