(a)[2]
Find the value of $A+2B$.
(b)[2]
Find the product $AB$.
(c)[2]
If $A\begin{pmatrix}x\\2\end{pmatrix}=\begin{pmatrix}8\\2y\end{pmatrix}$, find the values of $x$ and $y$.
(d)[2]
Find the inverse matrix $B^{-1}$.
Mathematics 4024 · O Level · Algebraic manipulation
Algebraic manipulation — practice question
$A=\begin{pmatrix}2&0\\3&1\end{pmatrix}$ together with $B=\begin{pmatrix}1&2\\-1&3\end{pmatrix}$.