# Question #61134

Apr 10, 2017

Ok, I hope I got the questions right...!

#### Explanation:

I will start from the second that helps to understand the first...

Now you can try to solve question a) where I think he wants the inverse:

The matrix with $a , b , c \mathmr{and} d$ will be your inverse!!!

If you cannot find it let me know...:-)

Apr 10, 2017

ok then...let us try:

#### Explanation:

Have a look:

Now try by yourself to test the inverse doing:
$A \cdot {A}^{-} 1$ to see if it gives you $\left(\begin{matrix}1 & 0 \\ 0 & 1\end{matrix}\right)$