** See attachment**
I'm having a hard time trying to figure out how to get outward unit normals for each surface of this shape. Here I have the question and the answer but still don't seem to be able to solve it..
I understand that to get a unit normal I divide by the length of n but I cant see how the answer is
S1: x = 0 and n (hat) = (-1,0,0)
S2: y = 0 and n (hat) = (0,-1,0)
S3: z = 0 and n (hat) = (0,0,-1)
for S1: nabla ( 3y + 2z -6 )
so is the unit normal
If so then the answers I have are wrong!
Please can someone help. I have included the problem in the attachment.