Finding Perpendicular Vectors and Line-Plane Intersection
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Questions and Answers

What is a vector that is perpendicular to the plane defined by the parametric equations given?

  • (3, 1, 2)
  • (4, 4, 2) (correct)
  • (1, -2, 3)
  • (3, 2, 1)
  • For the line defined by the parametric equations provided, what are the values of $x$, $y$, and $z$ when $t = 0$?

  • (1, 2, 3)
  • (1, 1, 2) (correct)
  • (0, 0, 1)
  • (2, 3, 4)
  • What is the equation of the plane in standard form derived from the given parametric equations?

  • 2x + y + z - 5 = 0
  • x + 3y + 2z - 10 = 0
  • x + 2y + z - 10 = 0 (correct)
  • x + 2y + z + 10 = 0
  • If the line intersects the plane, what method is best used to find the point of intersection?

    <p>Substitute the values of line equations into the plane equation.</p> Signup and view all the answers

    What does the intersection of the line with the plane imply if no solution exists?

    <p>The line is parallel to the plane.</p> Signup and view all the answers

    Study Notes

    Finding a Vector Perpendicular to a Plane

    • The parametric equation of a plane is given by x = 3 + 1 s + 4 t, y = 2 + 3 s − 2 t, z = − 1 + 2 s + 3 t.
    • To find a vector perpendicular to the plane, we need to find two vectors that lie in the plane.
    • We can get these vectors by setting s=1 and t=0, and then setting s=0 and t=1.
    • These vectors are: [1, 3, 2] and [4, -2, 3].
    • The cross product of these two vectors will give us a vector that is perpendicular to the plane.
    • The cross product is calculated as follows: [1, 3, 2] × [4, -2, 3] = [13, 5, -14].
    • Therefore, [13, 5, -14] is a vector that is perpendicular to the plane.

    Line-Plane Intersection

    • The line with parametric equations x = 1 + 1 t, y = 1 − t, z = 2 + t intersects the plane with equation x + 2 y + z − 10 = 0.
    • To find the point of intersection, substitute the parametric equations of the line into the equation of the plane.
    • This gives us: (1 + 1 t) + 2(1 − t) + (2 + t) − 10 = 0.
    • Simplifying the equation, we get 5 − t − 10 = 0.
    • Solving for t, we get t = -5.
    • Substitute this value of t back into the parametric equations of the line to find the point of intersection.
    • The point of intersection is (-4, 6, -3).

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    Description

    This quiz covers the concepts of finding a vector perpendicular to a plane using parametric equations and the cross product. It also includes determining the intersection point of a line with a given plane. Engage with real mathematical problems to enhance your understanding of these topics.

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