AQA Further Paper 2 2024 June — Question 16 9 marks

Exam BoardAQA
ModuleFurther Paper 2 (Further Paper 2)
Year2024
SessionJune
Marks9
PaperDownload PDF ↗
Mark schemeDownload PDF ↗
TopicCurve Sketching
TypeSketch rational with linear numerator
DifficultyChallenging +1.2 Part (a) is straightforward identification of asymptotes from rational function form. Parts (b)(i) and (b)(ii) require standard volumes of revolution techniques, but the rational function makes integration moderately challenging—students must handle partial fractions or substitution carefully. The two-axis rotation adds some complexity, but these are well-practiced A-level Further Maths techniques without requiring novel insight.
Spec1.02k Simplify rational expressions: factorising, cancelling, algebraic division4.08d Volumes of revolution: about x and y axes

The function f is defined by $$f(x) = \frac{ax + 5}{x + b}$$ where \(a\) and \(b\) are constants. The graph of \(y = f(x)\) has asymptotes \(x = -2\) and \(y = 3\)
  1. Write down the value of \(a\) and the value of \(b\) [2 marks]
  2. The diagram shows the graph of \(y = f(x)\) and its asymptotes. The shaded region \(R\) is enclosed by the graph of \(y = f(x)\), the \(x\)-axis and the \(y\)-axis. \includegraphics{figure_16}
    1. The shaded region \(R\) is rotated through \(360°\) about the \(x\)-axis to form a solid. Find the volume of this solid. Give your answer to three significant figures. [3 marks]
    2. The shaded region \(R\) is rotated through \(360°\) about the \(y\)-axis to form a solid. Find the volume of this solid. Give your answer to three significant figures. [4 marks]

Question 16:

AnswerMarks Guidance
16(a)Deduces that a = 3 2.2a
D educes that b = 22.2a B1
Subtotal2
QMarking instructions AO

AnswerMarks
16(b)(i)5
Deduces that x-intercept is – .
3
AnswerMarks Guidance
PI by correct answer.2.2a B1
f(x) =
x+2
5
x-intercept = –
3
0 3x+5 2
V = π∫   dx
 x+2 
5
3
= 21.2040…
= 21.2
Uses π∫y2dx
Condone missing dx and
missing/incorrect limits.
AnswerMarks Guidance
PI by correct answer.1.1a M1
Obtains AWRT 21.21.1b A1
Subtotal3
QMarking instructions AO

AnswerMarks Guidance
16(b)(ii)Deduces that y-intercept = 2.5
PI correct answer.2.2a B1
3x+5
y =
x+2
yx + 2y = 3x + 5
x(y – 3) = 5 – 2y
5–2y
x =
y–3
2.55–2y 2
V = π∫   dy
 y–3 
0
= 14.1360…
= 14.1
Deduces an expression for x in
terms of y
AnswerMarks Guidance
PI correct answer.2.2a M1
Uses π∫x2dy
Condone missing dy, use of dx
and missing/incorrect limits.
AnswerMarks Guidance
PI by correct answer.1.1a M1
Obtains AWRT 14.11.1b A1
Subtotal4
Question total9
QMarking Instructions AO
Question 16:
--- 16(a) ---
16(a) | Deduces that a = 3 | 2.2a | B1 | a = 3, b = 2
D educes that b = 2 | 2.2a | B1
Subtotal | 2
Q | Marking instructions | AO | Marks | Typical solution
--- 16(b)(i) ---
16(b)(i) | 5
Deduces that x-intercept is – .
3
PI by correct answer. | 2.2a | B1 | 3x+5
f(x) =
x+2
5
x-intercept = –
3
0 3x+5 2
V = π∫   dx
 x+2 
5
–
3
= 21.2040…
= 21.2
Uses π∫y2dx
Condone missing dx and
missing/incorrect limits.
PI by correct answer. | 1.1a | M1
Obtains AWRT 21.2 | 1.1b | A1
Subtotal | 3
Q | Marking instructions | AO | Marks | Typical solution
--- 16(b)(ii) ---
16(b)(ii) | Deduces that y-intercept = 2.5
PI correct answer. | 2.2a | B1 | y-intercept = 2.5
3x+5
y =
x+2
yx + 2y = 3x + 5
x(y – 3) = 5 – 2y
5–2y
x =
y–3
2.55–2y 2
V = π∫   dy
 y–3 
0
= 14.1360…
= 14.1
Deduces an expression for x in
terms of y
PI correct answer. | 2.2a | M1
Uses π∫x2dy
Condone missing dy, use of dx
and missing/incorrect limits.
PI by correct answer. | 1.1a | M1
Obtains AWRT 14.1 | 1.1b | A1
Subtotal | 4
Question total | 9
Q | Marking Instructions | AO | Marks | Typical Solution
The function f is defined by
$$f(x) = \frac{ax + 5}{x + b}$$

where $a$ and $b$ are constants.

The graph of $y = f(x)$ has asymptotes $x = -2$ and $y = 3$

\begin{enumerate}[label=(\alph*)]
\item Write down the value of $a$ and the value of $b$
[2 marks]

\item The diagram shows the graph of $y = f(x)$ and its asymptotes.

The shaded region $R$ is enclosed by the graph of $y = f(x)$, the $x$-axis and the $y$-axis.

\includegraphics{figure_16}

\begin{enumerate}[label=(\roman*)]
\item The shaded region $R$ is rotated through $360°$ about the $x$-axis to form a solid.

Find the volume of this solid.

Give your answer to three significant figures.
[3 marks]

\item The shaded region $R$ is rotated through $360°$ about the $y$-axis to form a solid.

Find the volume of this solid.

Give your answer to three significant figures.
[4 marks]
\end{enumerate}
\end{enumerate}

\hfill \mbox{\textit{AQA Further Paper 2 2024 Q16 [9]}}