Let f(w, x, y, z) = ∑(0, 4, 5, 7, 8, 9, 13, 15). Which of the following…

GATE · 2007 · CS

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

  1. A.

    x'y'z' + w'xy' + wy'z + xz

  2. B.

    w'y'z' + wx'y' + xz

  3. C.

    w'y'z' + wx'y' + xyz + xy'z

  4. D.

    x'y'z' + wx'y' + w'y

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