11 HL Planes

Here are a couple of short questions to look at before our next lesson.

1. Verify that the points $A(1,2,3)$, $B(-2,0,0)$, and $C(3,-2,-1)$ are not collinear.
2. Find the vector equation of the plane that contains all three points from question 1.
3. Find the Cartesian equation of the plane you determined in question 2.
4. Verify your answers using GeoGebra.