gandomlk00
gandomlk00
30-12-2017
Mathematics
contestada
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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