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Let -2 1 -1 A = 1 2 2 2 1 2 Give the 2,1 entry of A -'. a) b) -3 d) f) None of the above. 4,

Let -2 1 -1 A = 1 2 2 2 1 2 Give the 2,1 entry of A -'. a) b) -3 d) f) None of the above. 4,

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Let \[ A = \begin{bmatrix} -2 & 1 & -1 \\ 1 & 2 & 2 \\ 2 & 1 & 2 \\ \end{bmatrix} \] Give the 2,1 entry of \( A^{-1} \). a) ○ 5 b) ○ -3 c) ○ 4 d) ○ 2 e) ○ -1 f) ○ None of the above.
Transcribed Image Text:Let \[ A = \begin{bmatrix} -2 & 1 & -1 \\ 1 & 2 & 2 \\ 2 & 1 & 2 \\ \end{bmatrix} \] Give the 2,1 entry of \( A^{-1} \). a) ○ 5 b) ○ -3 c) ○ 4 d) ○ 2 e) ○ -1 f) ○ None of the above.
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