First slide
Planes in 3D
Question

The image of the point (1,3,4) in the plane  x2y=0 is

Moderate
Solution

Given (x1,y1,z1)=(1,3,4)

h+11=k32=l40=2(12(3))1+4+0

h+11=k32=l40=2(12(3))1+4+0

(h,k,l)=95,135,4

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