1.

If x=a+b, y= b+c , z=c+a, then the value of (x^(3) + y^(3) + z^(3) - 3xyz)/( a^(3) + b^(3) + c^(3) -3 abc) is equal to

Answer»

`3`
`2`
`1`
`1//3`

ANSWER :B


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