Karnaugh maps: don’t cares (cont’d)

• f(A,B,C,D) = ??m(1,3,5,7,9) + d(6,12,13)

  • f = A'D + B'C'D without don't cares
  • f = with don't cares

don't cares can be treated as1s or 0sdepending on which is more advantageous

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