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Types of Matrices Video Lecture | Business Mathematics and Statistics - B Com
FAQs on Types of Matrices Video Lecture - Business Mathematics and Statistics - B Com
| 1. What are the different types of matrices? |  |
Ans. There are several types of matrices, including:
1. <b>Row Matrix</b>: A matrix with a single row.
2. <b>Column Matrix</b>: A matrix with a single column.
3. <b>Square Matrix</b>: A matrix with the same number of rows and columns.
4. <b>Zero Matrix</b>: A matrix in which all elements are zero.
5. <b>Identity Matrix</b>: A square matrix with ones on the diagonal and zeros elsewhere.
6. <b>Diagonal Matrix</b>: A square matrix where all elements outside the main diagonal are zero.
| 2. What is a square matrix? | |
Ans. A square matrix is a matrix that has the same number of rows and columns. For instance, a 2x2 matrix or a 3x3 matrix is square. Square matrices are important in linear algebra because they can be used to represent linear transformations and can have properties like determinants and eigenvalues.
| 3. What is the difference between a row matrix and a column matrix? | |
Ans. A row matrix is characterized by having only one row and multiple columns, while a column matrix has only one column and multiple rows. For example, a row matrix can be represented as [1, 2, 3], whereas a column matrix can be represented as:
[1]
[2]
[3]
| 4. What is an identity matrix and its properties? | |
Ans. An identity matrix is a special type of square matrix where all the elements of the principal diagonal are ones, and all other elements are zeros. Its main property is that when any matrix is multiplied by the identity matrix, it remains unchanged. For example, if A is a matrix, then A * I = A, where I is the identity matrix.
| 5. How is a diagonal matrix defined? | |
Ans. A diagonal matrix is a square matrix in which all the entries outside the main diagonal are zero. The elements on the diagonal can be any value, including zero. For example, a 3x3 diagonal matrix might look like:
[5, 0, 0]
[0, 7, 0]
[0, 0, 9]
Diagonal matrices are useful in various applications including solving systems of linear equations.
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