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 The circumcentre of the triangle ABC where A,B,C are (a,0,0), (0,1,0) and (0,0,c) will lie in the plane

Answer»

`(X)/(a)+(y)/(B)+(z)/( c)=1`
`(x)/(a)+(y)/(b) +(z)/( c)=2`
`(x)/(a)+(y)/(b)+(z)/(c )=3`
`(x)/(b)+(y)/(b)+(z)/(c )=4`

Answer :a


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