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Questions and Answers
Which method is appropriate for a system of equations with dominant leading diagonal elements?
Which method is appropriate for a system of equations with dominant leading diagonal elements?
- Gauss Jordan method (correct)
- Non-homogeneous method
- Homogeneous method
- Jacobi Method
What is the maximum rank of a 4x5 matrix?
What is the maximum rank of a 4x5 matrix?
- 5
- 3
- 4 (correct)
- 6
Which formula correctly represents the Cauchy Binet formula for square matrices?
Which formula correctly represents the Cauchy Binet formula for square matrices?
- $|AB| = |A| + |B|$
- $|AB| = |A| - |B|$
- $AB = |A| + |B|$
- $|AB| = |A| |B|$ (correct)
What condition must be met for a square matrix A to be considered orthogonal?
What condition must be met for a square matrix A to be considered orthogonal?
Identify the nature of the matrix $egin{bmatrix} 1 & 2 & 3 \ 2 & 4 & 6 \ 3 & 6 & 9 ext{ \} \ ext{ \ ext{ } } ext{ } \end{bmatrix}$.
Identify the nature of the matrix $egin{bmatrix} 1 & 2 & 3 \ 2 & 4 & 6 \ 3 & 6 & 9 ext{ \} \ ext{ \ ext{ } } ext{ } \end{bmatrix}$.
When does the inverse of a matrix A exist?
When does the inverse of a matrix A exist?
Determine the rank of the matrix $egin{bmatrix} 1 & 2 & 3 \ 2 & 4 & 6 \ 3 & 6 & 9 ext{ \} \ ext{ \ ext{ } } ext{ } \end{bmatrix}$.
Determine the rank of the matrix $egin{bmatrix} 1 & 2 & 3 \ 2 & 4 & 6 \ 3 & 6 & 9 ext{ \} \ ext{ \ ext{ } } ext{ } \end{bmatrix}$.
What defines a symmetric matrix A?
What defines a symmetric matrix A?
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Study Notes
Matrix Methods
- Jacobi Method can be used when the leading diagonal elements of the coefficient matrix are dominant.
Rank of a Matrix
- The maximum rank of a 4x5 matrix is 4.
- The rank of a matrix is the number of linearly independent rows or columns in the matrix.
- The rank of a matrix cannot exceed the minimum of its number of rows and columns.
Matrix Properties
- Cauchy-Binet formula for square matrices: |AB| = |A| |B|
- Orthogonal matrix: A square matrix A is orthogonal if ATA=IA^TA = IATA=I, where I is the identity matrix.
- Symmetric matrix: A square matrix A is symmetric if A=ATA = A^TA=AT.
- Skew-symmetric matrix: A square matrix A is skew-symmetric if AT=−AA^T = -AAT=−A.
Matrix Operations
- Inverse of a matrix: The inverse of a matrix A exists only if A is non-singular.
- Matrix multiplication: AB is only possible if the number of columns in A is equal to the number of rows in B.
Matrix Transformations
- Echelon form: Only row operations can be used to transform a matrix into echelon form.
- Normal form: Both row and column operations can be used to transform a matrix into normal form.
Iterative Methods
- In the Gauss-Seidel method, the iteration process continues until the results of consecutive iterations are equal up to a specified tolerance.
Other Concepts
- Homogeneous system of equations has all constant terms equal to zero.
- Non-homogeneous system of equations has at least one constant term that's not zero.
- Singular matrix: A square matrix with a determinant of 0.
- Non-singular matrix: A square matrix with a determinant that's not 0.
- Unit matrix: A square matrix with 1's on the main diagonal and 0's elsewhere.
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