U is the symbol of ?

+1

654

1

+33

1 (sets)

2 (union)

3 (universal set)

4 (less than)

sadaatkhan Jan 5, 2020

edited by sadaatkhan Jan 5, 2020

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1⁺⁰ Answers

+118609

+2

U for union

Melody Jan 5, 2020

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