Use this ZIMSEC A-Level Pure Mathematics Paper 1 Lockdown Revision 2021 marking scheme for checking answers, revision, and exam preparation in Zimbabwe.
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This is the ZIMSEC A-Level Pure Mathematics marking scheme for Paper 1 from Lockdown Revision 2021. It shows how marks are awarded, so you can mark your own answers. The paper code is 6042/1. Time allowed: 3 hours.
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ONLINE
REVISION
General Certificate of Education Advanced Level
PURE MATHEMATICS
6042/1
PAPER 1
Lockdown Revision
2021 SESSION
3 hours
MARKING GUIDE
1) $\sqrt{9-4 x^{2}}$
Domain
\[
\begin{array}{l}
x \in \mathbb{R}: 9-4 x^{2} \geq 0
\quad(3-2 x)(3+2 x) \geq 0
\end{array}
\]
Critical values: $x= \pm \frac{3}{2}$
\[
\therefore x \in \mathbb{R}:-\frac{3}{2} \leq x \leq \frac{3}{2}
\]
[4]
2) The line $2 x-y+1=0$ is tangent to the circle at the point ( $2 ; 5$ ) and the centre of the circles lies on $x-2 y=4$.
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