The equation of the plane passing through the intersection of the plan...
The equation of required plane is
(x + 2y + 3z + 4) + λ (4x + 3y + 2z + 1) = 0
It passes through (0, 0, 0) So
4 + λ = 0
λ = - 4
So the equation of plane is
(x + 2y + 3z + 4) -4 (4x + 3y + 2z + 1) = 0
or x + 2y + 32 + 4 - 16x - 12y - 82 - 4 = 0
or 15x + 10y + 5z = 0
or 3x + 2y + z = 0
View all questions of this test
The equation of the plane passing through the intersection of the plan...
Intersection of the given planes:
To find the equation of the plane passing through the intersection of the given planes, we first need to find the point of intersection of these two planes.
Given planes:
1) x + 2y + 3z + 4 = 0
2) 4x + 3y + 2z + 1 = 0
Finding the point of intersection:
To find the point of intersection, we can solve the system of equations formed by the two plane equations.
We can use the method of substitution to solve the system of equations. Let's solve the second equation for z in terms of x and y:
2z = -4x - 3y - 1
z = (-4x - 3y - 1) / 2
Substituting this value of z into the first equation:
x + 2y + 3((-4x - 3y - 1) / 2) + 4 = 0
x + 2y - 6x - 9y - 3/2 + 4 = 0
-5x - 7y + 5/2 = 0
Simplifying further:
-10x - 14y + 5 = 0
10x + 14y = 5
Now we have a system of two linear equations:
-5x - 7y + 5/2 = 0
10x + 14y = 5
We can solve this system of equations using any method like substitution or elimination. Let's use elimination:
Multiplying the first equation by 2:
-10x - 14y + 5 = 0
-10x - 14y + 5 = 0
Adding the two equations:
-20x - 28y + 10 = 0
10x + 14y = 5
Simplifying further:
-20x - 28y + 10 + 10x + 14y = 0
-10x - 14y + 5 = 0
This equation represents the same plane as the two given planes. Therefore, the point of intersection of the two planes is (-10x - 14y + 5 = 0).
Equation of the plane passing through the origin:
To find the equation of the plane passing through the origin, we substitute (0, 0, 0) into the equation of the plane passing through the intersection of the given planes:
-10(0) - 14(0) + 5 = 0
5 = 0
Since this equation is not satisfied, the plane -10x - 14y + 5 = 0 does not pass through the origin.
Correct answer:
The correct equation of the plane passing through the intersection of the given planes and the origin is option 'B': 3x + 2y + z = 0.