Answer :

Formula : The equation of mid parallel plane is , say


Plane 1:ax + by + cz + d1 = 0 &


Plane 2:ax + by + cz + d2 = 0 is given by the formula



where () are constants of the planes


Therefore ,


First Plane 2x – 3y + 6z + 21 = 0 …… (1)


Second plane 2x – 3y + 6z – 14 = 0 …… (2)


Using equation (1) and (2)


Mid parallel plane


4x – 6y + 12z + 7 = 0


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