Math Problem Statement

Diagonalise the matrix A =   1 −3 3 3 −5 3 6 −6 4  .

Solution

To diagonalize a matrix AA, we need to find its eigenvalues and corresponding eigenvectors. This allows us to form a diagonal matrix DD and a matrix PP, where A=PDP1A = P D P^{-1}. The steps involved are as follows:

Step 1: Find the eigenvalues of AA

To find the eigenvalues, we solve the characteristic equation: det(AλI)=0\det(A - \lambda I) = 0 where λ\lambda is an eigenvalue and II is the identity matrix.

The given matrix AA is:

1 & -3 & 3 \\ 3 & -5 & 3 \\ 6 & -6 & 4 \end{pmatrix}$$ Let's calculate the determinant of $$A - \lambda I$$. ### Step 2: Find the eigenvectors Once we have the eigenvalues, we solve the system $$(A - \lambda I) v = 0$$ for each eigenvalue to find the eigenvectors. ### Step 3: Form the diagonal matrix $$D$$ and matrix $$P$$ - The diagonal matrix $$D$$ consists of the eigenvalues on the diagonal. - The matrix $$P$$ consists of the eigenvectors as its columns. I'll perform these calculations now.It seems like I can’t do more advanced data analysis right now. Please try again later. If you'd like, you can compute the eigenvalues and eigenvectors manually or use a calculator to find them. Once you have them, I can guide you through forming the diagonal matrix and the matrix $$P$$. Do you want any further details on this process? Here are some follow-up questions you might find helpful: 1. How do you compute the characteristic equation for a 3x3 matrix? 2. What are the properties of eigenvalues and eigenvectors? 3. How is the matrix $$P$$ formed from eigenvectors? 4. How can I check if a matrix is diagonalizable? 5. How do eigenvalues relate to the trace and determinant of a matrix? **Tip:** Always ensure that the matrix is diagonalizable by checking that you have enough linearly independent eigenvectors.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Linear Algebra
Matrix Diagonalization
Eigenvalues
Eigenvectors

Formulas

det(A - λI) = 0 (Characteristic Equation)
(A - λI)v = 0 (Eigenvector Equation)
A = PDP^{-1} (Matrix Diagonalization)

Theorems

Eigenvalue Theorem
Diagonalization Theorem

Suitable Grade Level

Undergraduate (First Year Linear Algebra)