Question
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Find the equation of the plane that is parallel to the vectors \( \langle 2,0,3\rangle \) and \( \langle 0,3,1\rangle \), passing through the point \( (2,0,-3) \). The equation of the plane is (Type an equation using \( x, y \), and \( z \) as the variables.)

Ask by Hamilton King. in the United States
Feb 03,2025

Real Tutor Solution

Tutor-Verified Answer

Answer

The equation of the plane is \(9x + 2y - 6z = 36\).

Solution

To find the equation of the plane that is parallel to the vectors \( \langle 2, 0, 3 \rangle \) and \( \langle 0, 3, 1 \rangle \), and passes through the point \( (2, 0, -3) \), follow these steps: 1. **Find the Normal Vector:** The normal vector to the plane can be found by taking the cross product of the two given vectors. \[ \vec{v}_1 = \langle 2, 0, 3 \rangle, \quad \vec{v}_2 = \langle 0, 3, 1 \rangle \] \[ \vec{n} = \vec{v}_1 \times \vec{v}_2 = \begin{vmatrix} \mathbf{i} & \mathbf{j} & \mathbf{k} \\ 2 & 0 & 3 \\ 0 & 3 & 1 \\ \end{vmatrix} = \langle -9, -2, 6 \rangle \] 2. **Form the Plane Equation:** Using the point \( (2, 0, -3) \) and the normal vector \( \vec{n} = \langle -9, -2, 6 \rangle \), the equation of the plane is: \[ -9(x - 2) - 2(y - 0) + 6(z + 3) = 0 \] Simplifying this: \[ -9x + 18 - 2y + 6z + 18 = 0 \implies -9x - 2y + 6z + 36 = 0 \] Alternatively, multiplying through by \(-1\) for a cleaner form: \[ 9x + 2y - 6z = 36 \] **Final Equation of the Plane:** \[ 9x + 2y - 6z = 36 \] **Answer:** After simplifying, an equation for the plane is  9 x + 2 y – 6 z = 36

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The Deep Dive

To find the equation of the plane, we first need to determine the normal vector to the plane. This can be obtained by taking the cross product of the two given vectors \( \langle 2,0,3\rangle \) and \( \langle 0,3,1\rangle \). Calculating the cross product: \[ \mathbf{n} = \langle 2,0,3\rangle \times \langle 0,3,1\rangle = \begin{vmatrix} \mathbf{i} & \mathbf{j} & \mathbf{k} \\ 2 & 0 & 3 \\ 0 & 3 & 1 \end{vmatrix} \] The determinant expands to: \[ \mathbf{n} = \mathbf{i}(0 \cdot 1 - 3 \cdot 3) - \mathbf{j}(2 \cdot 1 - 0 \cdot 3) + \mathbf{k}(2 \cdot 3 - 0 \cdot 0) \] \[ = \mathbf{i}(0 - 9) - \mathbf{j}(2 - 0) + \mathbf{k}(6 - 0) \] \[ = -9\mathbf{i} - 2\mathbf{j} + 6\mathbf{k} \] Thus, the normal vector is \( \langle -9, -2, 6 \rangle \). Using the point-normal form of the plane's equation, \( n_1(x - x_0) + n_2(y - y_0) + n_3(z - z_0) = 0 \), where \( n_1, n_2, n_3 \) are the components of the normal vector and \( (x_0, y_0, z_0) \) is the given point \( (2,0,-3) \): Substituting in the values, we have: \(-9(x - 2) - 2(y - 0) + 6(z + 3) = 0\) Distributing terms gives: \(-9x + 18 - 2y + 6z + 18 = 0\) Combining like terms results in: \(-9x - 2y + 6z + 36 = 0\) Rearranging this leads us to the final equation of the plane: \[ 9x + 2y - 6z = 36 \]

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