T-QAD Day 14 @ 30 April 2020

Notes Topic: Functions

Subtopic: Inverse functions

T-QAD for Today

Question 1 : Q1/D14/300420

Given the functions f(x) = 4 - 5x and g(x)=x²-2, find
(a) f ^-1(x)

(b) the value of f ^-1g(4)

                                                                                    (5 marks)

Question 2 : Q2/D14/300420

Write down the values of :

(a) f ^-1(-5)

(b) gf (-2)

                                                                                    (2 marks)

Answers T-QAD 29 April 2020

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Question 1:

Question 2 (a):

Question 2 (b):