Use this ZIMSEC A-Level Mathematics Paper 1 November 2018 marking scheme for checking answers, revision, and exam preparation in Zimbabwe.
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This is the ZIMSEC A-Level Mathematics marking scheme for Paper 1 from November 2018. It shows how marks are awarded, so you can mark your own answers.
Nov 2018 Pl Suggested Marking Guide.
Compiled by Tarvano N.P. (Tructers)
0772978155 0717267175.
22/10/2018
1. $f(x)=x^{3}-2 x^{2}+4 x-8$
The second not $=-2 i$ (conjugate)
Findingthe $3^{\text {rd }}$ net. Let it be $y$.
\[
\begin{array}{l}
\text { Sum of ruls }=\text { Co-effient of } \frac{-\left(x^{2}\right)}{x^{3}}=\frac{-(-2)}{1}
=2
\therefore y+-2 i+2 i=2
\end{array}
\]
∴ The thurd root is 2.
2. $\operatorname{Cs}\left(\theta-75^{\circ}\right)=\frac{\sqrt{6}-\sqrt{2}}{4}$
\[
\begin{array}{l}
\theta-75^{\circ}=\operatorname{Cs}^{-1}\left(\frac{\sqrt{6}-\sqrt{2}}{4}\right)
\theta-75^{\circ}=75^{\circ} \cdot 360-75^{\circ}
\theta=150^{\circ} \cdot 30
\end{array}
\]
3.
\[
\begin{aligned}
e^{2 x+y}=1 \Rightarrow \ln \left(e^{2 x+y}\right)=\ln (1) \Rightarrow 2 x+y | =0 \text { (I) }
2 \times(1)-4 x+2 y | =0 \text { (II) }
4 x-3 y | =10 \text { (III) }
5 y | =-10
y | =-2
\end{aligned}
\]
(c) Trockers
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