SOLUTION: Prove or give a counterexample. S ∪ T = T ⇔ S ⊆ T

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Question 644546: Prove or give a counterexample.
S ∪ T = T ⇔ S ⊆ T
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Hint: prove that if S is a subset of T, then the union of S and T is T.

Then prove that if S U T = T, then S must be a subset of T