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Q 2440201113.     If the sum of the squares of the distances of the
point `(x, y, z)` from the points `(a, 0, 0)` and `(-a, 0, 0)`
is `2c^2` , then which one of the following is correct?
NDA 2007 Paper 1
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)