Контрольная работа: Основы дискретной математики

+x1x2ùx4=ùx4+x1x2x3

y14=y9~y11 =x4(ùx1+ùx2)(x1+ùx2+ùx4)( ùx1+ùx2+ùx3+ùx4)(x2+ùx4)

(ùx1+x3+ùx4)+( ùx4+x1x2)( ùx1x2x4+x1x2x3x4+ùx2x4+x1ùx3x4)=

=x4(ùx1ùx2+ùx1ùx4+x1ùx2+ùx2)( ùx1+ùx2+ùx3+ùx4)(x2+ùx4)( ùx1+x3+ùx4)+

+( ùx4+x1x2)( ùx1x2x4+x1x2x3x4+ùx2x4+x1ùx3x4)=x4(ùx2+ùx1ùx4)( ùx1+ùx2+

+ùx3+ùx4)( ùx1x2+x2x3+x2ùx4+ùx1ùx4+ùx3ùx4+ùx4) +( ùx4+x1x2)( ùx1x2x4+

+ x1x2x3x4+ùx2x4+x1ùx3x4)= ùx2x4(ùx1+ùx2+ùx3+ùx4)( ùx1x2+x2x3+ùx4)+

+( ùx4+x1x2)( ùx1x2x4+x1x2x3x4+ùx2x4+x1ùx3x4)=( ùx1ùx2x4+ùx2x4+

+ùx2ùx3x4)( ùx1x2+x2x3+ùx4)+ ( ùx4+x1x2) (ùx1x2x4+x1x2x3x4+ùx2x4+

+x1ùx3x4)= ùx2x4(ùx1x2+x2x3+ùx4) +( ùx4+x1x2)( ùx1x2x4 +x1x2x3x4+ùx2x4+

x1ùx3x4)=( ùx4+x1x2)( ùx1x2x4+x1x2x3x4+ùx2x4+x1ùx3x4)=x1x2x3x4+

+x1x2ùx3x4=x1x2x4

y15=y10/y12/y14=((x1+ùx4)(x2+ùx4)(x3+ùx4)+x1(x2+ùx4))/y14=

=((x1x2+x1ùx4+x2ùx4+ùx4)+x1x2+x1ùx4)/y14=((x1x2x3+x1x2ùx4+x3ùx4+ùx4)+

+x1x2+x1ùx4)/y14=(x1x2+ùx4)/y14=(ùx1+ùx2)x4+(ùx1+ùx2+ùx4)=

=ùx1x4+ùx2x4+ùx1+ùx2+ùx4=ùx1+ùx2+ùx4

y16=y10ù→y13=(ùx1x4+ùx2x4+ùx3x4)x4(ùx1+ùx2+ùx3)= ùx1x4+ùx1ùx2x4+

+ùx1ùx3x4+ùx2x4+ùx1ùx2x4+ùx1ùx3x4+ùx3x4+ùx1ùx3x4+ùx2ùx3x4=

=ùx1x4+ùx2x4+ùx3x4

y17=y11~y14=(x1+ùx2+x4)( ùx1+ùx2+ùx3+ùx4)(x2+ùx4)( ùx1+x3+ùx4)

(ùx1+ùx2+ùx4)+( ùx1x2x4+x1x2x3x4+ùx2x4+x1ùx3x4)x1x2x4=

=(x1ùx2+x1ùx3+x1ùx4+ùx1ùx2+ùx2+ùx2ùx3+ùx2ùx4+ùx1x4+ùx2x4+ùx3x4)

(ùx1x2+x2x3+x2ùx4+ùx1ùx4+x3ùx4+ùx4)+x1x2x3x4+x1x2ùx3x4=

=ùx2ùx4+x1ùx3ùx4+x1x2x3ùx4+x1ùx4+ùx1x2x4+ùx1x2x3x4+ùx1x2ùx3x4+

+x1x2x3x4+x1x2ùx3x4=ùx2ùx4+x1ùx4+ùx1x2x4+ùx1x2x3x4+ùx1x2ùx3x4+

+x2x4=ùx2ùx4+x1ùx4+x2x4

y18=y15/y17=x1x2x4+(x2+x4)( ùx1+x4)( ùx2+ùx4)=x1x2x4+(ùx1x2+x2x4+

+ùx1x4+x4)( ùx2+ùx4)=x1x2x4+(ùx1x2+x4)( ùx2+ùx4)=x1x2x4+ùx1x2ùx4+

+ùx2x4=ùx1x2ùx4+x1x4+ùx2x4