1.

If the lines ax+y+1=0,x+by+1=0 and x+y+c=0 (a,b,c being distinct and different from 1) are concurrent, then the value of 11−a+11−b+11−c is:

Answer»

If the lines ax+y+1=0,x+by+1=0 and x+y+c=0 (a,b,c being distinct and different from 1) are concurrent, then the value of 11a+11b+11c is:



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