describe the given set with a single equation or with a pair of equations. the plane through the point parallel to a. the ​xy-plane b. the yz​-plane c. the​ xz-plane

Respuesta :

Equations for the set of the plane through the point [tex](x_0,y_0,z_0)[/tex] and parallel to:

a. xy-plane is [tex]z=z_0[/tex]   b. yz-plane is [tex]x=x_0[/tex] c. xz-plane is [tex]y=y_0[/tex]

The given set is the plane through the point  [tex](x_0,y_0,z_0)[/tex] parallel to:

a. xy-plane   b. yz-plane  c. xz-plane

Equation of the plane parallel to a plane containing a vector [tex]\vec r[/tex] through the point [tex](x_0,y_0,z_0)[/tex] is [tex](\vec r-(x_0,y_0,z_0)) .\vec n=0[/tex] ,where [tex]\vec n[/tex] is the normal to the plane and [tex]\vec r =x\vec i +y\vec j +z\vec k[/tex].

a. Plane through  [tex](x_0,y_0,z_0)[/tex] and parallel to the xy-plane is,

    [tex](x\vec i +y\vec j+z\vec k) - (x_0+y_0+z_0) . \vec k[/tex] = 0

⇒ [tex](x-x_0)\vec i +(y-y_0)\vec j+(z-z_0)\vec k) . \vec k=0[/tex]

⇒ [tex]z-z_0 =0[/tex]

⇒ [tex]z=z_0[/tex] is the equation of the plane through  [tex](x_0,y_0,z_0)[/tex] and parallel to xy-plane.

b. Plane through  [tex](x_0,y_0,z_0)[/tex] and parallel to the yz-plane is,

    [tex](x\vec i +y\vec j+z\vec k) - (x_0+y_0+z_0) . \vec i[/tex] = 0

⇒ [tex](x-x_0)\vec i +(y-y_0)\vec j+(z-z_0)\vec k) . \vec i=0[/tex]

⇒ [tex]x-x_0 =0[/tex]

⇒ [tex]x=x_0[/tex] is the equation of the plane through  [tex](x_0,y_0,z_0)[/tex] and parallel to yz-plane.

c.  Plane through  [tex](x_0,y_0,z_0)[/tex] and parallel to the xz-plane is,

    [tex](x\vec i +y\vec j+z\vec k) - (x_0+y_0+z_0) . \vec j[/tex] = 0

⇒ [tex](x-x_0)\vec i +(y-y_0)\vec j+(z-z_0)\vec k) . \vec j=0[/tex]

⇒ [tex]y-y_0 =0[/tex]

⇒ [tex]y=y_0[/tex] is the equation of the plane through  [tex](x_0,y_0,z_0)[/tex] and parallel to xz-plane.

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