1.

If ane1,bne-1,cne-1 and the system of equations, x=a(y+z),y=b(z+x),z=c(x+y) has a non-trivial solution, then.

Answer»

`a/(a+1)+B/(b+1)+C/(c+1)=0`
`a/(a+1)+b/(b+1)+c/(c+1)=1`
`(ABC)/((a+1)(b+1)(c+1))=1`
`(a+b+c)/((a+1)(b+1)(c+1))=2`

Answer :B


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