Lesson A7
A7 where appropriate, interpret simple expressions as functions with inputs and outputs Quiz: Pearson Edexcel Maths, Unit 2
20 questions
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Lesson A7, where appropriate, interpret simple expressions as functions with inputs and outputs: 20 multiple choice questions for the Pearson Edexcel GCSE Maths (1MA1), Unit 2: Algebra, written with Revision Ninja.
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The 20 questions
-
If f(x) = 2x + 1, what is f(3)?
- 5
- 7
- 9
- 6
-
What is the inverse function of f(x) = x + 4?
- x − 4
- x + 4
- 4 − x
- 4x
-
What represents a function applied to the output of another?
- Inverse function
- Quadratic function
- Linear function
- Composite function
-
If f(x) = x², what is the output for an input of −5?
- 10
- -10
- 25
- -25
-
If f(x) = 3x − 2 and g(x) = x + 4, find f(g(1)).
- 8
- 13
- 12
- 10
-
If f(x) = 2x, what is f⁻¹(10)?
- 20
- 5
- 8
- 12
-
If g(x) = x³, what is g⁻¹(64)?
- 8
- 21.3
- 4
- 192
-
If f(x) = x + 3 and g(x) = 2x, find g(f(x)).
- x² + 6
- 2x + 6
- x + 6
- 2x + 3
-
If h(x) = 5 − x, what is h(2)?
- -2
- 3
- 7
- -3
-
Find the input of f(x) = 4x − 1 that gives an output of 15.
- 14
- 16
- 3.5
- 4
-
If f(x) = x/2 + 1, which expression gives f⁻¹(x)?
- 2x − 2
- x/2 − 1
- (x − 1)/2
- 2x + 1
-
An input of 0 is given to f(x) = (x + 2)². What is the output?
- 0
- 4
- 8
- 2
-
If f(x) = x + 1 and g(x) = x², find f(g(x)).
- x² + 1
- x + 2
- (x + 1)²
- x² + x
-
For f(x) = 3x − 6, what value of x makes f(x) = 0?
- -2
- 2
- 0
- 6
-
What is f⁻¹(x) for f(x) = (2x − 3)/5?
- 5x/2 − 3
- (5x − 3)/2
- (2x + 3)/5
- (5x + 3)/2
-
If f(x) = 2x and g(x) = x + 3, what is g(f(2))?
- 4
- 8
- 5
- 7
-
If f(x) = 1/x for x ≠ 0, what is f(f(x))?
- 1/x²
- 1
- x
- x²
-
What is f⁻¹(x) for f(x) = x³ + 1?
- ∛x − 1
- x³ − 1
- (x − 1)^(1/3)
- 1/(x³ + 1)
-
If f(x) = x + 2 and g(x) = x − 1, what is f(g(x)) − g(f(x))?
- -2
- 0
- 2
- 1
-
A function maps an input x to 3x + 5. The output is 26. What is the input?
- 9
- 7
- 6
- 8
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