1.

A variable plane makes with the coordinate planes, a tetrahedron of constant volume 64k^(3). Then the locus of the centroid of tetrahedron is the surface

Answer»

`xyz=6k^(3)`
`xy+yz+zx=6k^(2)`
`X^(2)+y^(2)+Z^(2)=8k^(2)`
`x^(-2)+y^(-2) +z^(-2) =8k^(2)`

ANSWER :a


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