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Date May 2022 Marks available 2 Reference code 22M.1.SL.TZ2.1
Level Standard Level Paper Paper 1 (without calculator) Time zone Time zone 2
Command term Find Question number 1 Adapted from N/A

Question

The following table shows values of f(x) and g(x) for different values of x.

Both f and g are one-to-one functions.

Find g(0).

[1]
a.

Find (fg)(0).

[2]
b.

Find the value of x such that f(x)=0.

[2]
c.

Markscheme

g(0)=-2         A1

 

[1 mark]

a.

evidence of using composite function         (M1)

 fg0  OR  f-2

(fg)(0)=8         A1

 

[2 marks]

b.

x=3          A2

 

[2 marks]

c.

Examiners report

This question was completed successfully by most of the candidates. In part (b) of the question, a few candidates did not recognize the notation for a composite function and instead incorrectly thought they were supposed to multiply values for f(0) and g(0).

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

Syllabus sections

Topic 2—Functions » SL 2.2—Functions, notation domain, range and inverse as reflection
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