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Calculus: Early Transcendentals
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Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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**Finding the Plane Equation**

**Problem:**
Determine the equation of a plane that passes through the point (6, 7, -2) and contains the line given by the parametric equations:
\[ x = 4 - 2t, \ y = 3 + 8t, \ z = 7 + 4t \]

**Solution:**

1. **Given Data:**

   - Point: \((6, 7, -2)\)
   - Line: \(x = 4 - 2t, \ y = 3 + 8t, \ z = 7 + 4t\)

2. **Direction Vector of the Line:**

   The parametric equations can be written as:
   \[
   \vec{r} = \langle 4, 3, 7 \rangle + t \langle -2, 8, 4 \rangle
   \]

   The direction vector is:
   \[
   \vec{d} = \langle -2, 8, 4 \rangle 
   \]

3. **Vector from Point on the Line to the Given Point:**
   
   Let \( P = (6, 7, -2) \) be the given point and \( Q = (4, 3, 7) \) be a point on the line when \( t = 0 \).

   Vector \( \vec{PQ} = \langle 6 - 4, 7 - 3, -2 - 7 \rangle = \langle 2, 4, -9 \rangle \)

4. **Normal Vector to the Plane (Cross Product):**

   Compute the normal vector \( \vec{n} \) to the plane which is perpendicular to both \( \vec{PQ} \) and the direction vector \( \vec{d} \):
   
   \[
   \vec{n} = \vec{PQ} \times \vec{d} 
   \]

   Calculate the cross product:
   \[
   \vec{n} = \begin{vmatrix}
   \mathbf{i} & \mathbf{j} & \mathbf{k} \\
   2 & 4 & -9 \\
   -2 & 8 & 4 \\
   \end{vmatrix}
   \]

   \
Transcribed Image Text:**Finding the Plane Equation** **Problem:** Determine the equation of a plane that passes through the point (6, 7, -2) and contains the line given by the parametric equations: \[ x = 4 - 2t, \ y = 3 + 8t, \ z = 7 + 4t \] **Solution:** 1. **Given Data:** - Point: \((6, 7, -2)\) - Line: \(x = 4 - 2t, \ y = 3 + 8t, \ z = 7 + 4t\) 2. **Direction Vector of the Line:** The parametric equations can be written as: \[ \vec{r} = \langle 4, 3, 7 \rangle + t \langle -2, 8, 4 \rangle \] The direction vector is: \[ \vec{d} = \langle -2, 8, 4 \rangle \] 3. **Vector from Point on the Line to the Given Point:** Let \( P = (6, 7, -2) \) be the given point and \( Q = (4, 3, 7) \) be a point on the line when \( t = 0 \). Vector \( \vec{PQ} = \langle 6 - 4, 7 - 3, -2 - 7 \rangle = \langle 2, 4, -9 \rangle \) 4. **Normal Vector to the Plane (Cross Product):** Compute the normal vector \( \vec{n} \) to the plane which is perpendicular to both \( \vec{PQ} \) and the direction vector \( \vec{d} \): \[ \vec{n} = \vec{PQ} \times \vec{d} \] Calculate the cross product: \[ \vec{n} = \begin{vmatrix} \mathbf{i} & \mathbf{j} & \mathbf{k} \\ 2 & 4 & -9 \\ -2 & 8 & 4 \\ \end{vmatrix} \] \
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