Math Problem Statement

Where does the line through (-3, 1, 0) and (-1, 3, 4) intersect the plane 2x + y - z = -2?

Solution

The question asks where the line passing through the points (3,1,0)(-3, 1, 0) and (1,3,4)(-1, 3, 4) intersects the plane given by the equation 2x+yz=22x + y - z = -2.

Step-by-step solution:

Step 1: Find the parametric equation of the line

The line passing through two points can be represented parametrically. If the points are (3,1,0)(-3, 1, 0) and (1,3,4)(-1, 3, 4), we can write the parametric equations as follows.

Let the parameter tt vary between the two points:

x=3+t(1(3))=3+2tx = -3 + t(-1 - (-3)) = -3 + 2t y=1+t(31)=1+2ty = 1 + t(3 - 1) = 1 + 2t z=0+t(40)=4tz = 0 + t(4 - 0) = 4t

Thus, the parametric equation of the line is: (x,y,z)=(3+2t,1+2t,4t)(x, y, z) = (-3 + 2t, 1 + 2t, 4t)

Step 2: Find the intersection with the plane

We substitute these parametric equations into the plane equation 2x+yz=22x + y - z = -2:

2(3+2t)+(1+2t)4t=22(-3 + 2t) + (1 + 2t) - 4t = -2

Simplifying this equation:

6+4t+1+2t4t=2-6 + 4t + 1 + 2t - 4t = -2 5+2t=2-5 + 2t = -2 2t=32t = 3 t=32t = \frac{3}{2}

Step 3: Find the coordinates of the intersection

Now, substitute t=32t = \frac{3}{2} into the parametric equations for xx, yy, and zz:

x=3+2(32)=3+3=0x = -3 + 2\left(\frac{3}{2}\right) = -3 + 3 = 0 y=1+2(32)=1+3=4y = 1 + 2\left(\frac{3}{2}\right) = 1 + 3 = 4 z=4(32)=6z = 4\left(\frac{3}{2}\right) = 6

Thus, the intersection point is (0,4,6)(0, 4, 6).

Final Answer:

The line intersects the plane at the point (0,4,6)(0, 4, 6).

Would you like further details or have any questions about the steps?

Here are 5 related questions:

  1. How do we find the direction vector for a line passing through two points?
  2. How can we derive the parametric equations of a line from two points?
  3. How do you verify that a point lies on a given plane?
  4. What is the geometric interpretation of a plane equation like 2x+yz=22x + y - z = -2?
  5. How can we use systems of equations to find the intersection of two planes?

Tip: The parametric form of a line is often very useful for finding intersections with planes, lines, and other geometric objects!

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Analytic Geometry
Parametric Equations
Plane-Geometry Intersection

Formulas

Parametric equations for a line passing through two points: x = x1 + t(x2 - x1), y = y1 + t(y2 - y1), z = z1 + t(z2 - z1)
Plane equation: 2x + y - z = -2

Theorems

Equation of a plane
Parametric form of a line
Line-plane intersection

Suitable Grade Level

Grades 10-12