Skip to main content\(\newcommand{\R}{\mathbb{R}}
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A plot with perpendicular arrows labeled x, y, and z. A point is labeled P with coordinates (1,-2,3) and a vertical green segment from the point to the xy-plane. A red segment from the intersection of the green segment with the xy-plane and at the y-axis is shown and labeled with 1. A blue segment from the intersection of the green segment with the xy-plane and the x-axis is shown and labeled with a -2.