Date | May 2017 | Marks available | 2 | Reference code | 17M.1.AHL.TZ2.H_2 |
Level | Additional Higher Level | Paper | Paper 1 (without calculator) | Time zone | Time zone 2 |
Command term | Write down | Question number | H_2 | Adapted from | N/A |
Question
The function f is defined by f(x)=2x3+5, −2⩽x⩽2.
Write down the range of f.
[2]
a.
Find an expression for f−1(x).
[2]
b.
Write down the domain and range of f−1.
[2]
c.
Markscheme
* This question is from an exam for a previous syllabus, and may contain minor differences in marking or structure.
−11⩽f(x)⩽21 A1A1
Note: A1 for correct end points, A1 for correct inequalities.
[2 marks]
a.
f−1(x)=3√x−52 (M1)A1
[2 marks]
b.
−11⩽x⩽21, −2⩽f−1(x)⩽2 A1A1
[2 marks]
c.
Examiners report
[N/A]
a.
[N/A]
b.
[N/A]
c.