How to make this matrix diagonally dominant?

Q: Find two 3x3 invertible matrices A and B, such that A+B is not invertible.

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Q: Explain the fact “Cofactors are useful when matrices have many zeros”.

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Q: Explain Row matrix and Column matrix?

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Q: Explain why the matrix A + C does not exist.

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Q: Explain why the matrix 80] A B 0 A is not diagonalisable.

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Q: Define the term matrix equation.

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Q: What is the multiplicative identity matrix?

A: According to the question, we have to define the multiplicative identity matrix. As the above…

Q: How do you find an inverse of an elementary matrix (especially 3 x3 rows)?

A: Elementary matrix is those matrices that differ from the identity matrix from a single elementary…

Q: Answer is supposed to be in the form of a 4x4 matrix

A: Ans- Given the input-output table involving four sectors of U.S economy in the year of 1977. To…

Q: How do I know if I can invert a matrix or not? What is a square matrix?

A: Ans(i):

Q: Determine whether the following matrix is invertible by finding its determinant. 4 -14 -56

A: Consider the matrix 14-14-56