Question

Find the inverse matrix or type

"none". (Use decimals)
3
2
4
1
? ]
Enter

Answer 1

`\left[\begin{array}{cc}-0.2&0.4\\0.8&-0.6\end{array}\right]`

Explanation:

`\left[\begin{array}{cc}3&2\\4&1\end{array}\right] ^(-1) =(1)/(3*1-2*4) \left[\begin{array}{cc}1&-2\\-4&3\end{array}\right]=(-0.2)*\left[\begin{array}{cc}1&-2\\-4&3\end{array}\right]=\left[\begin{array}{cc}-0.2&0.4\\0.8&-0.6\end{array}\right]\\`