1.

In three dimensions there may be more than one point, which are equidistant from three given noncolliner points A,B,C. One of these points will be circumcentre of the triangle ABC y coordinate of the circumcentre of triangle ABC must be ac

Answer»

`(AC)/(a+b+c)`
`(a^(2)c^(2)-b^(4))/(a^(3)+b^(3)+c^(3))`
`((b^(2)c^(2)+a^(2)b^(2)-a^(2)c^(2))/(a^(2)b^(2)+b^(2)c^(2)+c^(2)a^(2)))`
`(b^(3)(a^(2)+c^(2)))/(2(b^(2)c^(2)+a^(2)c^(2)+a^(2)b^(2)))`

Answer :c


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