In: Math
6)
a). Find the equation of the plane through the origin and perpendicular to x+y+z = 5 and 2x+y−2z = 7
b). Let A = (−1,3,0), B = (3,2,4) and C = (1,−1,5).
( I ) Find an equation for the plane that passes through these
three points.
( II ) Find the area of the triangle determined by these three points.
6)a) Given:
x+y+z=5, 2x+y-2z=7
To find: Equation of plane perpendicular to these planes
Soln:
The normal vectors of the given planes are
The normal vector of the required plane is the vector product of these two normal vectors since the required plane is perpendicular to both these planes.
The normal vector of the required plane is given by
The equation of a plane having normal vector is given by where is a point in the plane.
It is given that the origin lies in the plane. So substituting the values of A, B, C we get
-3x+4y-z = 0.
b)