Question

7) In each part, use the given information to find A: (Explain your work!) a) $A^{-1} = egin{bmatrix} 2 & -1 \ 3 & 5 end{bmatrix}$ b) $(I + 2A)^{-1} = egin{bmatrix} -1 & 2 \ 4 & 5 end{bmatrix}$

          7) In each part, use the given information to find A: (Explain your work!)
a) $A^{-1} = egin{bmatrix} 2 & -1 \ 3 & 5 end{bmatrix}$
b) $(I + 2A)^{-1} = egin{bmatrix} -1 & 2 \ 4 & 5 end{bmatrix}$

Added by Pilar P.

Elementary and Intermediate Algebra

Alan S. Tussy, R. David Gustafson 5th Edition

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Solved by Expert Manuel Vasquez

Step 1

- The inverse of a matrix $ B $ is denoted as $ B^{-1} $, and if $ B = A^{-1} $, then $ A = (A^{-1})^{-1} $. Show more…

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Question

7) In each part, use the given information to find A: (Explain your work!) a) $A^{-1} = egin{bmatrix} 2 & -1 \ 3 & 5 end{bmatrix}$ b) $(I + 2A)^{-1} = egin{bmatrix} -1 & 2 \ 4 & 5 end{bmatrix}$

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7) In each part, use the given information to find A: (Explain your work!) a) $A^{-1} = egin{bmatrix} 2 & -1 \ 3 & 5 end{bmatrix}$ b) $(I + 2A)^{-1} = egin{bmatrix} -1 & 2 \ 4 & 5 end{bmatrix}$