1.

If the orthocentre and the circucentre of a triangle are (-3,5,1),(3,3,-1) then the centroid is

Answer»

(3, 3, 4)
`((3)/(2), (7)/(2), (9)/(2))`
`(9, 9, 12) `
`((9)/(2), (-3)/(2), (3)/(2))`

Answer :a


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