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Find projection of point on plane using W|A?

Posted 2 months ago
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For example, the projection of the point $P=(1,2,3)$ on the plane $x+y+z=3$ is the point $Q=(0,1,2)$.

How do I ask Wolfram Alpha to compute this? I've tried "projection of point (1,2,3) on plane x+y+z=3", but this doesn't work.

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