D = = {x : x is an integer, `-5 le x le 2`}
E= (x : x is an integer, `-3 le x le 4`}
F= {x : x is an integer, `0 le x le 5`}
verify
`D uu (E uu F)=(D uu E)uuF` .

D = = {x : x is an integer, -5 le x le 2 } E= (x : x is an integer, -3 le x le 4 } F= {x : x is an integer, 0 le x le 5 } Find D uu E

D = = {x : x is an integer, -5 le x le 2 } E= (x : x is an integer, -3 le x le 4 } F= {x : x is an integer, 0 le x le 5 } Find E uu F

D = {x : x is an integer, -5 le x le 2 } E= (x : x is an integer, -3 le x le 4 } F= {x : x is an integer, 0 le x le 5 } Find D uu F

D = {x : x is an integer, -5 le x le 2 } E= (x : x is an integer, -3 le x le 4 } F= {x : x is an integer, 0 le x le 5 } Find D nn E

D = {x : x is an integer, -5 le x le 2 } E= (x : x is an integer, -3 le x le 4 } F= {x : x is an integer, 0 le x le 5 } Find E nn F

D = {x : x is an integer, -5 le x le 2 } E= (x : x is an integer, -3 le x le 4 } F= {x : x is an integer, 0 le x le 5 } Find D nn F

D, E and F are three subsets of universal set U defined as follows : D = {x : x is a positive integer le7 } E= {x : x is a positive integer : 5le xle 9 } F= {x : x is a positive integer : 3le xle 12 } U = {x : x is a positive integer le12 } prove D-(E uu F )=(D-E) nn (D-F)

D, E and F are three subsets of universal set U defined as follows : D = {x : x is a positive integer le7 } E= {x : x is a positive integer : 5le xle 9 } F= {x : x is a positive integer : 3le xle 12 } U = {x : x is a positive integer le12 } prove D-(E nn F)=(D-E) uu (D-F)

D, E and F are three subsets of universal set U defined as follows : D = {x : x is a negative integer ge3 }, E= { x : x is a negative integer ge-6 } F = { x : x is a negative integer -3 ge x ge -10 } U = { x:x is a negative integer ge-10 } prove D-(E uu F) = (D-E) nn (D-F)

D, E and F are three subsets of universal set U defined as follows : D = {x : x is a negative integer ge3 }, E= { x : x is a negative integer ge-6 } F = { x : x is a negative integer -3 ge x ge -10 } U = { x:x is a negative integer ge-10 } prove D-(E nn F) = (D-E) uu (D-F)