a A = id 10 b c e f det A = 2 det (-2. A) det 1/2 A-¹ det ((2A) ³) det (3 (AT) -1)

Algebra and Trigonometry (6th Edition)
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ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Here is a transcription of the handwritten notes from the image, formatted for an educational website:

---

### Mathematical Concepts: Determinants and Matrix Operations

In this example, we are considering the determinant of a given matrix \( A \).

#### Matrix \( A \):

\[ 
A = \begin{pmatrix}
a & b & c \\
d & e & f \\
g & h & i \\
\end{pmatrix}
\]

#### Determinant of Matrix \( A \):

\[ 
\text{det} \begin{pmatrix}
a & b & c \\
d & e & f \\
g & h & i \\
\end{pmatrix}
\]

Given transformations:

1. \(\text{det} (2A)\)
2. \(\text{det} (-2A)\)
3. \(\text{det} (B A^{-1})\)
4. \(\text{det} ( (2A)^3 B (A^{-1})^{-1} )\)

For clarity:
- \( 2A \) represents matrix \( A \) scaled by 2.
- \( -2A \) represents matrix \( A \) scaled by -2.
- \( B \) is another matrix.
- \( A^{-1} \) is the inverse of matrix \( A \).
- \( \text{det} \) denotes the determinant of the matrix.

Students are encouraged to calculate these determinants as an exercise to understand the properties of determinants under different matrix operations.

---
Transcribed Image Text:Here is a transcription of the handwritten notes from the image, formatted for an educational website: --- ### Mathematical Concepts: Determinants and Matrix Operations In this example, we are considering the determinant of a given matrix \( A \). #### Matrix \( A \): \[ A = \begin{pmatrix} a & b & c \\ d & e & f \\ g & h & i \\ \end{pmatrix} \] #### Determinant of Matrix \( A \): \[ \text{det} \begin{pmatrix} a & b & c \\ d & e & f \\ g & h & i \\ \end{pmatrix} \] Given transformations: 1. \(\text{det} (2A)\) 2. \(\text{det} (-2A)\) 3. \(\text{det} (B A^{-1})\) 4. \(\text{det} ( (2A)^3 B (A^{-1})^{-1} )\) For clarity: - \( 2A \) represents matrix \( A \) scaled by 2. - \( -2A \) represents matrix \( A \) scaled by -2. - \( B \) is another matrix. - \( A^{-1} \) is the inverse of matrix \( A \). - \( \text{det} \) denotes the determinant of the matrix. Students are encouraged to calculate these determinants as an exercise to understand the properties of determinants under different matrix operations. ---
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