Question

If ξ = {all digits used in our number system} , A={x :x≥4 },B={x:2<x<10} Find (A ∪ B)′​

Answer 1

A = { 4 , 5 , 6 ......... }

B = { 3 , 4 , 5 ..... , 9 }

A U B = { 3 , 4 , 5 , ......... }

( AUB )' = { ........... -1 , 0 , 1 , 2 }

Above was refernce but actually answer would be in order like the question's one

( A U B )' = { x : 2>= x }