Boolean Algebra Kmaps reading-invalid inputs

Learning Challenge

Boolean Algebra


In the last section of the second reading material “Kmaps”
the sections is titled INVALID INPUTS

in the example given where F(w, x, y, z) = w’z + yz
0000, 0010, 0101, and 1100, where labeled as undefined.
Why are those undefined?

why are those values X?

What I’ve tried

I drew up my own Kmap for the example F(w, x, y, z) = w’z + yz
I understand that in the function x isn’t used but not sure what that has to do with it.


Thank you very much!

Hi Jia,
I’d recommend taking a look at this post from a few months ago in which we discussed a similar question. There are some video resources that I think will be helpful for you.

thank you for the video link

My understanding is that for those marked as X

either 1 or 0 could be the possible answer, is that correct?

Thank you very much for your time

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Exactly, you can treat each x as a 0 or a 1, in order to help you make your groupings.

Thank you as always Jesse!

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