Asked by Shelby
Consider the following matrix.
A =
7, -5
-4, 3
Choose the correct description of A
Find A^−1 if it exists.
Answer either Choice 1, or Choice 2:
CHOICE 1:
A is nonsingular; that is, it has an inverse.
A^-1 = _________
or CHOICE 2 :
A is singular; that is, it's inverse DOES NOT EXIST.
A =
7, -5
-4, 3
Choose the correct description of A
Find A^−1 if it exists.
Answer either Choice 1, or Choice 2:
CHOICE 1:
A is nonsingular; that is, it has an inverse.
A^-1 = _________
or CHOICE 2 :
A is singular; that is, it's inverse DOES NOT EXIST.
Answers
Answered by
Steve
A^-1 exists if |A| is not zero.
Here, |A| = 21-20 = 1
so, A has an inverse.
Here, |A| = 21-20 = 1
so, A has an inverse.
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