Math Problem Statement

Solve the equation B^{-1} X A^{-1} = C^{-1}, given matrices A = [-1, -3; 2, 0], B = [-2, 4; 0, 6], and C = [2, 0; 10, -1]. Find matrix X.

Solution

The given equation is:

B1XA1=C1B^{-1} X A^{-1} = C^{-1}

with the matrices:

A=(1320),B=(2406),C=(20101).A = \begin{pmatrix} -1 & -3 \\ 2 & 0 \end{pmatrix}, \quad B = \begin{pmatrix} -2 & 4 \\ 0 & 6 \end{pmatrix}, \quad C = \begin{pmatrix} 2 & 0 \\ 10 & -1 \end{pmatrix}.

The task is to find XX.

Steps:

  1. First, find the inverses B1,A1,C1B^{-1}, A^{-1}, C^{-1}.
  2. Then solve for XX by rearranging the equation: X=BC1AX = B C^{-1} A (multiplying both sides by BB and AA).

I will calculate these now.Here are the results of the calculations:

  1. The inverse of matrix AA is: A1=(00.50.33330.1667)A^{-1} = \begin{pmatrix} 0 & 0.5 \\ -0.3333 & -0.1667 \end{pmatrix}

  2. The inverse of matrix BB is: B1=(0.50.333300.1667)B^{-1} = \begin{pmatrix} -0.5 & 0.3333 \\ 0 & 0.1667 \end{pmatrix}

  3. The inverse of matrix CC is: C1=(0.5051)C^{-1} = \begin{pmatrix} 0.5 & 0 \\ 5 & -1 \end{pmatrix}

  4. The matrix XX is: X=(27574290)X = \begin{pmatrix} -27 & -57 \\ -42 & -90 \end{pmatrix}

Would you like more details or explanations on any step?

Here are 5 questions related to this problem:

  1. What are the properties of matrix inverses?
  2. How do you compute the determinant of a 2x2 matrix?
  3. Can every matrix be inverted? Why or why not?
  4. What is the significance of the inverse of a matrix in linear algebra?
  5. How would the solution change if matrix BB were not invertible?

Tip: To verify if a matrix is invertible, its determinant should not be zero.

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Math Problem Analysis

Mathematical Concepts

Matrix Inversion
Matrix Multiplication
Linear Algebra

Formulas

Matrix inverse formula for 2x2 matrix: A^{-1} = (1/det(A)) * adj(A)
Matrix multiplication

Theorems

Inverse Matrix Theorem
Determinant of a 2x2 Matrix

Suitable Grade Level

University Level Linear Algebra