1.

Let f(w, x, y, z) = ∑(0, 4, 5, 7, 8, 9, 13, 15). Which of the following expressions are NOT equivalent to f?

A. x'y'z' + w'xy' + wy'z + xz
B. w'y'z' + wx'y' + xz
C. w'y'z' + wx'y' + xyz + xy'z
D. x'y'z' + wx'y' + w'y
Answer» E.


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