Exercises: Understand Zero and Identity Matrices

Work through each section in order. Show your work where indicated.

Grade 9·19 problems·~30 min·Common Core Math - HS Number and Quantity·standard·hsn-vm-c-10

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Fluency Practice

Find $A^{-1}$ for $A = \begin{bmatrix}3 & 1\\2 & 4\end{bmatrix}$ .

$\frac{1}{10}\begin{bmatrix}4 & -1\\-2 & 3\end{bmatrix}$

$\begin{bmatrix}1/3 & 1\\1/2 & 1/4\end{bmatrix}$

$\frac{1}{10}\begin{bmatrix}3 & 1\\2 & 4\end{bmatrix}$

$\begin{bmatrix}4 & -1\\-2 & 3\end{bmatrix}$