In Problem (a) evaluate each determinant, and (b) use the determinant to decide whether each matrix has an inverse.
In Problem (a) evaluate each determinant, and (b) use the determinant to decide whether each matrix has an inverse.
Chapter4: Systems Of Linear Equations
Section4.6: Solve Systems Of Equations Using Determinants
Problem 4.96TI: Evaluate the determinant |213122440| by expanding by minors.
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Question
In Problem (a) evaluate each determinant, and (b) use the determinant to decide whether each matrix has an inverse.
Expert Solution
Step 1
(a)
Use the Ti-84 calculator to evaluate determinant.
Step 1: Press [2ND] key, and then press [MATRIX] key.
Step 2: Move to MATH and select 1:det.
Step 3: Then, press [ALPHA] key and [ZOOM], then, select rows 3, columns 3, and hit Ok.
Step 4: Write your determinant and press [ENTER] key. Use (-) key to write negative numbers.
It gives answer as −5.
Therefore, the determinant is −5.
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