(a)[2]
Find the product $AB$.
(b)[2]
Find $k$.
(c)[2]
Find the inverse $A^{-1}$.
Mathematics 0580 · IGCSE · Algebraic manipulation
Algebraic manipulation — practice question
The matrices are defined by $A = \begin{pmatrix} 3 & 2 \\ -5 & 0 \end{pmatrix}$, $B = \begin{pmatrix} -2 & 5 \\ 4 & 1 \end{pmatrix}$ and $C = (-1\ \ k)$.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The matrix $\begin{pmatrix}2 & 17 \\ 10 & -25\end{pmatrix}$.” …
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