3860/CH3/EX3.22/Ex3_22.txt


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 f(a,b,c,d) = summation of minterms(0,1,4,5,10,11,14)

 The function f'(a,b,c,d) = summation of minterms(2,3,6,7,8,9,12,13,15)

        a'b' a'b  ab   ab' 

 c'd'    1    1    

 cd'     1    1 

 cd                    1

 cd'              1    1

 The three solutions are given below

  g1 = c'd' + ab + b'd' + a'cd

  g2 = c'd' + ab + b'd' + a'b'c

  g3 = c'd' + ab + a'd' + a'b'c