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| 1. |
If a+b+c=0, then (1)/( b^(2) + c^(2) - a^(2) ) +(1)/( c^(2) + a^(2) - b^(2) ) + (1)/( a^(2) + b^(2) -c^(2) ) is equal to |
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Answer» 3 |
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