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### Question Asked by a Student from EXXAMM.com Team

** 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 **