Find the equation of the plane which passes through the point (3, 4, –1) and is parallel to the plane 2x – 3y + 5z + 7 = 0. Also, find the distance between the two planes.
Since the plane is parallel to 2x – 3y + 5z + 7 = 0, it must be of the form:
2x – 3y + 5z + θ = 0
According to question,
The plane passes through (3, 4, –1)
⟹ 2(3) – 3(4) +5(–1) + θ = 0
⟹ θ = 11
So, the equation of the plane is as follows:
2x – 3y + 5z + 11 = 0
Distance of the plane 2x – 3y + 5z + 7 = 0 from (3, 4, –1):
We know, the distance of point (x1,y1,z1) from the plane
is given by:
Putting the necessary values,
⟹
⟹
∴ the distance of the plane 2x – 3y + 5z + 7 = 0 from (3, 4, –1) is
units