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Classify each element of {√7,-1/4,0,3.14,4,22/7} as a member of ... N, Q, R - Q, Z

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Classify each element of {√7,-1/4,0,3.14,4,22/7} as a member of ... N, Q, R - Q, Z

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-1/4 is a rational number (i.e.) (-1/4) Q, 

3.14 ∈ Q 

0, 4 are integers and 0 ∈ Z, 4 ∈ N, Z, Q

(22/7) ∈ Q

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