Question

1. Find an equation of the plane shown here.

Answer 1

here are the formulas

http://en.wikipedia.org/wiki/Plane_(geometry)#Defining_a_plane_through_three_points

but since these 3 points are all on the axis, you can solve system without a matrix
\[6A +D = 0\]
\[2B+D = 0\]
\[3C +D = 0\]
set D to be any arbitrary non zero value
D = -6
thus
A = 1
B = 3
C = 2

Answer 2

Thank you so much! x

Answer 3

yw