1.

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.

Answer»

If the linesx+ay+a=0,bx+y+b=0 and cx+cy+1=0 are concurrent,then write the value of 2abcabbcca.



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