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).
Find (f∘g)(0).
Find the value of x such that f(x)=0.
Markscheme
g(0)=-2 A1
[1 mark]
evidence of using composite function (M1)
f(g(0)) OR f(-2)
(f∘g)(0)=8 A1
[2 marks]
x=3 A2
[2 marks]
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).