1 -6 - 22 1 If T is defined by T(x)= Ax, find a vector x whose image under T is b, and determine whether x is unique. Let A = -2 and b = 12 4 - 6 Find a single vector x whose image under T is b. X =

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### Linear Transformations: Finding a Vector

Let's explore how to find a vector \( \mathbf{x} \) whose image under a given linear transformation \( T \) is \( \mathbf{b} \). Assume \( T \) is defined by the matrix multiplication \( T(\mathbf{x}) = A\mathbf{x} \). 

Given:
\[ A = \begin{pmatrix} 1 & -6 & -22 \\ -2 & 4 & 12 \end{pmatrix} \]
\[ \mathbf{b} = \begin{pmatrix} -1 \\ -6 \end{pmatrix} \]

**Problem:**
Find a single vector \( \mathbf{x} \) whose image under \( T \) is \( \mathbf{b} \) and determine whether such a vector \( \mathbf{x} \) is unique.

**Solution:**

To find \( \mathbf{x} = \begin{pmatrix} x_1 \\ x_2 \\ x_3 \end{pmatrix} \) that satisfies \( A\mathbf{x} = \mathbf{b} \), we set up the following system of linear equations based on the matrix multiplication \( A\mathbf{x} = \mathbf{b} \):

\[ \begin{pmatrix} 1 & -6 & -22 \\ -2 & 4 & 12 \end{pmatrix} \begin{pmatrix} x_1 \\ x_2 \\ x_3 \end{pmatrix} = \begin{pmatrix} -1 \\ -6 \end{pmatrix} \]

Next, solve the system of equations to determine \( \mathbf{x} \).

### Interactive Section

**Find a single vector \( \mathbf{x} \) whose image under \( T \) is \( \mathbf{b} \).**

\[ \mathbf{x} = \boxed{ \begin{pmatrix} \, \, \end{pmatrix} } \]

In this space, students might be encouraged to use methods such as Gaussian elimination or matrix inversion to solve the system.

---

To see the complete steps for solving the system, additional resources are available in the section on Solving Systems of Linear Equations.
Transcribed Image Text:### Linear Transformations: Finding a Vector Let's explore how to find a vector \( \mathbf{x} \) whose image under a given linear transformation \( T \) is \( \mathbf{b} \). Assume \( T \) is defined by the matrix multiplication \( T(\mathbf{x}) = A\mathbf{x} \). Given: \[ A = \begin{pmatrix} 1 & -6 & -22 \\ -2 & 4 & 12 \end{pmatrix} \] \[ \mathbf{b} = \begin{pmatrix} -1 \\ -6 \end{pmatrix} \] **Problem:** Find a single vector \( \mathbf{x} \) whose image under \( T \) is \( \mathbf{b} \) and determine whether such a vector \( \mathbf{x} \) is unique. **Solution:** To find \( \mathbf{x} = \begin{pmatrix} x_1 \\ x_2 \\ x_3 \end{pmatrix} \) that satisfies \( A\mathbf{x} = \mathbf{b} \), we set up the following system of linear equations based on the matrix multiplication \( A\mathbf{x} = \mathbf{b} \): \[ \begin{pmatrix} 1 & -6 & -22 \\ -2 & 4 & 12 \end{pmatrix} \begin{pmatrix} x_1 \\ x_2 \\ x_3 \end{pmatrix} = \begin{pmatrix} -1 \\ -6 \end{pmatrix} \] Next, solve the system of equations to determine \( \mathbf{x} \). ### Interactive Section **Find a single vector \( \mathbf{x} \) whose image under \( T \) is \( \mathbf{b} \).** \[ \mathbf{x} = \boxed{ \begin{pmatrix} \, \, \end{pmatrix} } \] In this space, students might be encouraged to use methods such as Gaussian elimination or matrix inversion to solve the system. --- To see the complete steps for solving the system, additional resources are available in the section on Solving Systems of Linear Equations.
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