Question

A= {3,6,9,12,15,18} and B= {4,8,12,1620} find (A-B)=?​

Answer 1

A = { 2,6,9,12,15,18 }

B = { 4,8,12,16,20 }

A - B = A - ( A n B )

==> A - { 12 }

==> { 2,6,9,12,15,18 } - { 12 }

==> { 2,6,9,15,18 }

A - B = { 2,6,9,15,18 }