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Date May Example questions Marks available 4 Reference code EXM.1.AHL.TZ0.6
Level Additional Higher Level Paper Paper 1 (without calculator) Time zone Time zone 0
Command term State and Justify Question number 6 Adapted from N/A

Question

Let f(x)=x210x+5x+1,xR,x1.

Find the co-ordinates of all stationary points.

[4]
a.

Write down the equation of the vertical asymptote.

[1]
b.

With justification, state if each stationary point is a minimum, maximum or horizontal point of inflection.

[4]
c.

Markscheme

f(x)=(2x10)(x+1)(x210x+5)1(x+1)2          M1

f(x)=0x2+2x15=0(x+5)(x3)=0          M1

Stationary points are (5,20)and(3,4)         A1A1

[4 marks]

a.

x=1        A1

[1 mark]

b.

Looking at the nature table

        M1A1

(5,20) is a max and (3,4) is a min         A1A1

[4 marks]

c.

Examiners report

[N/A]
a.
[N/A]
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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