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--- math54-f22:quiz7 [2022/10/19 00:47]
gsi_sergio_escobar
+++ math54-f22:quiz7 [2026/02/21 14:41] (current)
@@ Line 1: / Line 1: @@
 Sample Quiz 7 Questions
-  * What is $A^{-1}$ if $A = \begin{bmatrix}
+  * What is $A^{-1}$ if $$A = \begin{bmatrix} 1 & 0 & 1 \cr 0 & 1 & 1 \cr 0 & 0 & 1 \end{bmatrix}$$
-&0&1\\ 0&1&1\\ 0&0&-1
+  * Write $$B = \begin{bmatrix} 1 & 2 & 3 \cr 4 & 5 & 6 \cr 7 & 8 & 9 \end{bmatrix}$$ in row-echelon form.
-\end{bmatrix}.$
+  * What are the image and kernel of the matrix $$C = \begin{bmatrix} 1 & 1 & 1 \cr 1 & 2 & 1 \cr 2 & 3 & 2 \end{bmatrix},$$
-  *
+find a basis for the image and kernel of $C$.

Lecture Notes