Answer: √(x² + y² + z²).
- A √(x² + y² + z²)
- B x² + y² + z²
- C √(x + y + z)
- D x + y + z
Correct answer: A. √(x² + y² + z²)
Explanation: Applying the distance formula with the origin (0,0,0) gives OP = √(x² + y² + z²).
Concept context
Coordinate axes and planes in space, octants, distance between two points, and the section formula
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