Answer: (+, +, −).
- A (+, +, +)
- B (+, +, −)
- C (+, −, −)
- D (−, +, −)
Correct answer: B. (+, +, −)
Explanation: Reading the signs directly, x and y are positive while z is negative.
Concept context
Coordinate axes and planes in space, octants, distance between two points, and the section formula
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