Functions | Cambridge O Level Maths Topic Questions 2025

1a

3 marks

$g (x) = 2 x + 3 h (x) = 2^{x}$

Find $x$ when $gg (x) = 7$ .

$x$ = ......................

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1b

2 marks

Find $x$ when $h^{- 1} (x) = 5$ .

$x$ =.............................

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1a

2 marks

$f (x) = 3 - 2 x g (x) = 2 x + 3$

i)

Find

f (- 3)

.

[1]

ii)

Find

gf (- 3)

.

[1]

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1b

2 marks

Find $f^{- 1} (x)$ .

$f^{- 1} (x) = . . . . . . . . . . . . . . . . . . . .$

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1

4 marks

$g (x) = 1 - 2 x$

Find the value of

Find $g (x) g (x) - gg (x)$ , giving your answer in the form $a x^{2} + b x + c$ .

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Functions (Cambridge O Level Maths)