1.

If x,y,z are all different from zero and |{:(1+x,1,1),(1,1+y,1),(1,1,1+z):}|=0 then value of x^(-1)+y^(-1)+z^(-1) is ".........."

Answer»

XYZ
`X^(-1).y^(-1).Z^(-1)`
`-(xyz)`
-1

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