gandomlk00 gandomlk00

30-12-2017
Mathematics

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A⊆B , C⊆D ⇒ A∪C ⊆ B∪D
How?

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Аноним Аноним

30-12-2017

Not sure how to do this analytically but if you draw a Venn diagram youll see that its true. Sorry I cant help more.

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