Find all solutions of the equation , where , , are integer numbers.
Solution
Any group of three if satisfies the condition of the problem.
Let's find solutions of the equation . From the known equation
it follows that , thus . We can assume that any two from , , are coprime. Really, if the prime divides , , then it can divide the equation and therefore .
Therefore, we can think that , , , where , , are coprime. Then , , are the third powers of integers , , . On the other side, any group of three , if , satisfy the condition of the problem.
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