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Nơi chia sẻ tri thức, kết nối cộng đồng và giải đáp mọi thắc mắc từ A–

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Abc=bca=cab

Abc=bca=cab

This means moving A to where B was, B to where C was and C to where A was. The net result is that rotation is the same but current balance has ...Read more

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