Which of the following sets of planes are parallel to each other? – McqOptions

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1.	Which of the following sets of planes are parallel to each other?
A.	2x+3y+4z=8 and 3x+9y+12z=7
B.	2x+3y+4z=2 and 4x+6y+8z=9
C.	3x+2y+4z=0 and 3x+4y+2z=0
D.	2x+4y+8z=9 and 4x+2y+7z=0
Answer» C. 3x+2y+4z=0 and 3x+4y+2z=0

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