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Date May Example questions Marks available 1 Reference code EXM.1.AHL.TZ0.5
Level Additional Higher Level Paper Paper 1 (without calculator) Time zone Time zone 0
Command term Write down Question number 5 Adapted from N/A

Question

Let f(x)=2x25x12x+2,xR,x2.

Find all the intercepts of the graph of f(x) with both the x and y axes.

[4]
a.

Write down the equation of the vertical asymptote.

[1]
b.

As x± the graph of f(x) approaches an oblique straight line asymptote.

Divide 2x25x12 by x+2 to find the equation of this asymptote.

[4]
c.

Markscheme

x=0y=6 intercept on the y axes is (0, −6)     A1

2x25x12=0(2x+3)(x4)=0x=32or4      M1

intercepts on the x axes are (32,0)and(4,0)     A1A1

[4 marks]

a.

x=2    A1

[1 mark]

b.

f(x)=2x9+6x+2          M1A1

So equation of asymptote is y=2x9          M1A1

[4 marks]

c.

Examiners report

[N/A]
a.
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b.
[N/A]
c.

Syllabus sections

Topic 2—Functions » AHL 2.13—Rational functions
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Topic 2—Functions

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