A plane meets the co-ordinate axes at th...

A plane meets the co-ordinate axes at the points A, B, C respectively in such a way that the centroid of `Delta`ABC is `(1, r, r^(2))` for some real r. If the plane passes through the point (5, 5, -12) then r =

A

`(3)/(2)`

B

4

C

`-4`

D

`-(3)/(2)`

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