Foot of the perpendicular from a point to a plane

1. A.
   $(2, - 2,1)$
2. B.
   $(2, - 3,0)$
3. C.
   $(1, - 2,3)$
4. D.
   $(4,1,6)$

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1. A.
   $\left( 2,\frac{2}{3},\frac{- 10}{3} \right)$
2. B.
   $\left( \frac{8}{3},\frac{7}{3},\frac{- 4}{3} \right)$
3. C.
   $\left( \frac{4}{3},\frac{2}{3},\frac{- 8}{3} \right)$
4. D.
   $\left( \frac{8}{3},\frac{4}{3},\frac{- 7}{3} \right)$

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1. A.
   $(2, -3, -6)$
2. B.
   $\left(\dfrac{2}{7}, \dfrac{-3}{7}, \dfrac{-6}{7}\right)$
3. C.
   $(-2, 3, 6)$
4. D.
   $\left(\dfrac{-2}{7}, \dfrac{3}{7}, \dfrac{6}{7}\right)$

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