Question
Find the cofactor matrix of the following matrices : $\left[\begin{array}{cc}1 & 2 \\ 5 & -8\end{array}\right]$
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| p | q | r | q → r | r → p | (q → r) ˅ (r → p) |
| T | T | T | T | $\square$ | T |
| T | T | F | F | $\square$ | $\square$ |
| T | F | T | T | $\square$ | T |
| T | F | F | T | $\square$ | $\square$ |
| F | T | T | $\square$ | F | T |
| F | T | F | $\square$ | T | $\square$ |
| F | F | T | $\square$ | F | T |
| F | F | F | $\square$ | T | $\square$ |
| Commodity | A | B | C | D |
| Price (in Rs.) for 1995 | 95 | y | 80 | 35 |
| Price (in Rs.) for 2003 | 116 | 74 | 92 | 42 |
| X | Y | |
| MEAN | 50 | 140 |
| VARIANCE | 160 | 165 |