1.

If G is the centroid of Delta ABC, G' is the centroid of Delta A' B' C' then vec(A)A' + vec(B)B' + vec(C)C' =

Answer»

`BAR(0)`
`bar(GG^(1))`
`2bar(GG^(1))`
`3BAR(GG^(1))`

Answer :D


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