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If the linesx+ay+a=0,bx+y+b=0 and cx+cy+1=0 are concurrent,then write the value of 2abc−ab−bc−ca. |
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Answer» If the linesx+ay+a=0,bx+y+b=0 and cx+cy+1=0 are concurrent,then write the value of 2abc−ab−bc−ca. |
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