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AMC (AIMO validation set) / Define xdiamond y to be |x−y| for all real numbers x and y. What is the value of ((1diamond2)diamond3)-(1diamond(2diamond3))? · Discussion

Discussing Define xdiamond y to be |x−y| for all real numbers x and y. What is the value of ((1diamond2)diamond3)-(1diamond(2diamond3))? · AMC (AIMO validation set)

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