1.

O is the circumcentre of the triangle ABC and R_(1), R_(2), R_(3)are the radii of the circumcircles of the triangles OBC, OCA and OAB respectively, thena/R_(1) + b/R_(2) + c/R_(3)is equal to

Answer»

`(ABC)/R `
`(abc)/R^(3)`
`(abc)/R^(4)`
None

ANSWER :B


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