1.

Consider a triangular pyramid ABCDthe positionvector of whose angular points are a(3,0,1) B(-1,4,1) C(5,2,3) and D(0,-5,4) Let G be the point of intersectionof the medians of triangle BCDThe lengths of the vector bar(AG) is

Answer»

`sqrt(17)`
`(sqrt(51))/(3)`
`(sqrt(51))/(9)`
`(sqrt(51))/(4)`

ANSWER :B


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