1.

If (a_(1),1,1),(1,a_(2),1) and (1,1,a_(3)) are coplaner (where a_(i)ge1,i=1,2,3) then underset(i=1)overset(3)sum(1)/(1-a_(i)) = …………..

Answer»

0
`-1`
1
`3-underset(i=1)OVERSET(3)SUM a_(i)`

Answer :C


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