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ex 9 Dau coroana!!! Promit!!!

Ex 9 Dau Coroana Promit class=

Răspuns :

A={10,11,12,13,}

B={10,11,12,13}

C={11,12,13}

D={10,11,12,13,14}

a) A=B

b) C⊂A

c)B⊂D

d)C⊂B

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