Three Dimensional Geometry: JEE Mains 2022 June 29 Shift 1

Medium· Distance of a point from a plane or line· +4 / 0
Let dd be the distance between the foot of perpendiculars of the points P(1,2,−1)P(1,2,-1) and Q(2,−1,3)Q(2,-1,3) on the plane −x+y+z=1-x+y+z=1. Then d2d^2 is equal to ______.
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