
Tofind:If the matrix A has an inverse it is called invertible or _____if it does not have an inverse then it’s called _______

Answer to Problem 3E
If a matrix A has an inverse, it is called invertible or non-singular, if it does not have an inverse, it’s called singular.
Explanation of Solution
Given:A matrix has an inverse
A matrix doesn’t have an inverse
Concept used:
Finding out the inverse of a matrix, its required to find the quotient of the adjoint of the matrix and its determinant.
Calculation:
If a matrix A has an inverse, it is called invertible or non-singular, if it does not have an inverse, it’s called singular.
A singular matrix can be also described as the one who discriminant is equals to 0.
While finding out the inverse of a matrix, its required to find the quotient of the adjoint of the matrix and its determinant.
Hence, it’s crucial that the determinant is finite and non- zero.
Hence if the determinant is 0, then the inverse cannot exist.
Chapter 8 Solutions
EBK PRECALCULUS W/LIMITS
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