Question 4 - A-Level Maths

Exam Board	Edexcel
Module	Paper 1 (Paper 1)
Year	2020
Session	October
Topic	Composite & Inverse Functions

$$f ( x ) = \frac { 3 x - 7 } { x - 2 } \quad x \in \mathbb { R } , x \neq 2$$

Find $f ^ { - 1 } ( 7 )$
Show that $\operatorname { ff } ( x ) = \frac { a x + b } { x - 3 }$ where $a$ and $b$ are integers to be found.
VI4V SIHI NI ILIUM ION OC VIAV SIHI NI III IM I O N OO VJAV SIHI NI III M M ION OC