Q.
The coordinates of a point which is equidistant from the four points O,A,B and C. When O is the origin and A,B,C are the points on the axes of respectively at distances 2,6,4 from the origin in the positive side is
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a
1,2,3
b
1,3,2
c
2,3,1
d
-1,-3,-2
answer is B.
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Detailed Solution
Suppose that P(x1,y1,z1) be the required point. It is at equal distances from all four points, OP=PA=PB=PCIt gives x=1,y=3,z=2Therefore, the required point is 1,3,2
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