Question Appendix.10: Using a Counterexample in Linear Algebra Use a counterexampl...
Using a Counterexample in Linear Algebra
Use a counterexample to show that the statement is false.
The set of all 2 × 2 matrices of the form
\begin{bmatrix} 1 & b \\ c & d \end{bmatrix}with the standard operations is a vector space.
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