1.

A variable plane is at a constant distance P from the origin and meets the axes in A, B and C. The locus of the centroid of tetrahedran OABC is

Answer»

`x^(-2)+y^(-2), Z^(-2)=p^(-2)`
`x^(-2)+y^(-2)+z^(-2)=4p^(-2)`
`x^(-2)+y^(-2)+z^(-2)=16p^(-2)`
`x^(2)+y^(2)+z^(2)=p^(2)`

Answer :C


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