Question

If A'UB = U , then show that A is a subset of B.

Answer 1

hope ur helps you......

Answer 2

Answer:

Step-by-step explanation:

x ∈ B ......(i)

x ∈ B ∪ ∅

x ∈ (A∩A') ∪ B

x ∈ (A∪B) ∩ (A'∪B)

x ∈ (A∪B) ∩ U

x ∈ (A∪B)

x ∈ B  (from i) & x ∈ (A∪B)

B = A∪B

A ⊂ (A∪B)

A ⊂ B

Hence Proved.