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hoo100

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mathsgao

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hoo100: ½ð±Ò+3, ¡ïÓаïÖú 2014-08-22 22:31:04
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2Â¥2014-08-22 17:31:28
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hoo100

Ìú³æ (ÖøÃûдÊÖ)

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2Â¥: Originally posted by mathsgao at 2014-08-22 17:31:28
The answer is NO.
Below is an example
A =  
B =
A*B = .

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