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Mathematics, 22.08.2021 14:00 puppy4151

Một tam giác có 3 cạnh là a, b,c thỏa (a+b-c)^3+(b+c-a)^3+(c+a-b)^3=a^3+b ^3+c^3 chứng minh tam giác đó là tam giác đều

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Một tam giác có 3 cạnh là a, b,c thỏa (a+b-c)^3+(b+c-a)^3+(c+a-b)^3=a^3+b ^3+c^3 chứng minh tam g...
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