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(c) The function h is defined by h(x) = −x − 2x for x > −1.
2
Express −x − 2x in the form of a − (x − b) and find the values of a and b.
2
2
[2]
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−1
(d) Express h (x) in terms of x.
= – 1
2 [2]
19. It is given that f(x) = 3x + 1 and g(x) = 2 − x.
(a) Find g(6).
[1]
1
(b) Find the value of s if f(s − 2) = g(6).
3
[2]
(c) Find gf(x).
[2]
Cambridge IGCSE
TM
10 Ace Your Additional Mathematics
Chapter 1 Add Math (1 to 12).indd 10 14/03/2022 12:16 PM
