1. The problem statement, all variables and given/known data
What does triangle line mean? What is "+" for sets here?
Once I know that, if I need assistance, I will show an attempt. Otherwise I will be satisfied. :)
2. Relevant equations
3. The attempt at a solution
What does triangle line mean? What is "+" for sets here?
Once I know that, if I need assistance, I will show an attempt. Otherwise I will be satisfied. :)
2. Relevant equations
3. The attempt at a solution
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