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B = {x|x ∈ N and 1 ≤ x < 9}

Sagot :

POKKOCHAN145

Answer:

Set membership x ∈ X means x is an element of the set X. (Non-membership is written x ∈ X.) Set inclusion X ⊆ Y means every element of X is an element of Y ; X is a subset of Y .

Step-by-step explanation:

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