Further Graphs & Tangents (Cambridge (CIE) IGCSE Maths: Extended)

Exam Questions

4 hours24 questions
1
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4 marks

On the diagram, sketch the graph of y space equals space open parentheses x space plus space 1 close parentheses open parentheses x space minus space 3 close parentheses squared.

Label the values where the graph meets the x-axis and the y-axis.

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2
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2 marks

Sketch the graph of the function.

y equals 1 over x

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3
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3 marks

The diagrams A, B, C, D, E and F are six graphs of different functions.

cie-igcse-q21-graphs-diagrams

Complete the table to identify the correct graph for each function. One has been done for you. 

Function

y space equals space x space plus space 1

y space equals space 1 space minus space x over 3

y space equals space 2 x squared

y space equals space minus 4 over x

Diagram

E

 

 

 

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1a
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3 marks
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straight f left parenthesis x right parenthesis space equals space x left parenthesis x space plus space 2 right parenthesis left parenthesis x space – space 3 right parenthesis space

On the diagram, sketch the graph of y space equals space straight f left parenthesis x right parenthesis space space space space space space for space – 3 space less-than or slanted equal to space x space less-than or slanted equal to space 4
Show the values of the intersections with the axes. 

1b
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3 marks

Expand and simplify.

x left parenthesis x space plus space 2 right parenthesis left parenthesis x space – space 3 right parenthesis

1c
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5 marks

A is the point space left parenthesis 1 comma space – 6 right parenthesis.

The tangent to the graph of y space equals space straight f left parenthesis x right parenthesis at  A meets the y-axis at B.

Find the coordinates of B.

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2a
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4 marks

The diagram shows the graph of y space equals space straight f open parentheses x close parentheses for  negative 3 space less or equal than space x space less or equal than space 3.

cie-igcse-2020-oct-nov-p4-tz1-q5a

i) Solve space straight f left parenthesis space x right parenthesis space equals space 14. space

space x space equals space................................................ [1]

ii) By drawing a suitable tangent, find an estimate of the gradient of the graph at the point left parenthesis negative 2 comma space 4 right parenthesis.

 

[3]

2b
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3 marks

By drawing a suitable straight line on the grid, solvespace space straight f left parenthesis space x right parenthesis space equals space 2 x space minus space 2 space for negative 3 space less or equal than space x space less or equal than space 3.

space x space equals space................................................

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3a
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3 marks

The table shows some values for y equals 2 x cubed minus 4 x squared plus 3.

x

-1

-0.5

0

0.5

1

1.5

2

y

-3

1.75

 

 

 

0.75

3

Complete the table.

3b
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4 marks

Draw the graph of y equals 2 x cubed minus 4 x squared plus 3 for negative 1 less or equal than x less or equal than 2.

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3c
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4 marks

i) Use your graph to solve the equation 2 x cubed minus 4 x squared plus 3 equals 1.5.

x equals ........................ or x equals ........................ or x equals ........................ [3]

ii) The equation 2 x cubed minus 4 x squared plus 3 equals k has only one solution for negative 1 less or equal than x less or equal than 2.

Write down a possible integer value of k.

[1]

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4a
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2 marks

straight f left parenthesis x right parenthesis equals x squared over 4 minus 4 over xx not equal to 0   Complete the table for straight f left parenthesis x right parenthesis.

x

0.5

1

2

3

4

5

6

straight f left parenthesis x right parenthesis

-7.9

-3.8

 

0.9

 

5.5

8.3

4b
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3 marks

The graph of y equals straight f left parenthesis x right parenthesis for negative 6 less or equal than x less or equal than negative 0.5 is drawn on the grid.

cie-igcse-2018-oct-nov-p4-tz3-q4b

On the same grid, draw the graph of y equals straight f left parenthesis x right parenthesis for 0.5 less or equal than x less or equal than 6.

4c
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3 marks

By drawing a suitable tangent, estimate the gradient of the graph of y equals straight f left parenthesis x right parenthesis at the point (–4, 5).

4d
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1 mark

straight g left parenthesis x right parenthesis equals 9 over xx not equal to 0   Complete the table for straight g left parenthesis x right parenthesis.  

x

-4

-3

-2

-1

 

1

2

3

4

straight g left parenthesis x right parenthesis

-2.3

 

-4.5

-9

 

9

4.5

 

2.3

4e
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4 marks

On the same grid, draw the graph of  y equals straight g left parenthesis x right parenthesis for  negative 4 less or equal than x less or equal than negative 1  and  1 less or equal than x less or equal than 4.

4f
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2 marks

i) Use your graphs to find the value of x when  straight f left parenthesis x right parenthesis equals straight g left parenthesis x right parenthesis.

x = ................................................. [1]

ii) Write down an inequality to show the positive values of x for which  straight f left parenthesis x right parenthesis greater than straight g left parenthesis x right parenthesis.

 [1]

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5a
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4 marks

i) y equals 2 to the power of x
Complete the table

x

0

1

2

3

4

y

 

2

4

8

 

[2]

ii) y equals 14 minus x squared Complete the table

x

0

1

2

3

4

y

 

13

10

5

 

[2]

5b
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6 marks

On the grid, draw the graphs of  y equals 2 to the power of x and  y equals 14 minus x squared  for  0 less or equal than x less or equal than 4.

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5c
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2 marks

Use your graphs to solve the equations.

i) 2 to the power of x equals 12

x equals............................................... [1]

ii) 2 to the power of x equals 14 minus x squared

x equals............................................... [1]

5d
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3 marks

i) On the grid, draw the line from the point left parenthesis 4 comma space 2 right parenthesis that has a gradient of negative 4.

[1]

ii) Complete the statement.

This straight line is a .................................. to the graph of y equals 14 minus x squared at the point ( ....... , ....... ).

[2]

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1a
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2 marks

straight f left parenthesis x right parenthesis space equals space 20 over x space plus space x comma space space space space x space not equal to space 0

Complete the table.

x

-10

-8

-5

-2

-1.6

 

1.6

2

5

8

10

straight f left parenthesis x right parenthesis

-12

-10.5

-9

-12

-14.1

 

14.1

12

 

 

12

1b
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5 marks

On the grid, draw the graph of  y space equals space straight f left parenthesis x right parenthesis for space – 10 space less-than or slanted equal to space x space less-than or slanted equal to space – 1.6 space and  1.6 space less-than or slanted equal to space x space less-than or slanted equal to space 10.

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1c
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2 marks

Using your graph, solve the equation straight f left parenthesis x right parenthesis space equals space 11.

x = ..................   or   x = .................

1d
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2 marks

k is a prime number and space straight f left parenthesis x right parenthesis space equals space k spacehas no solutions.

Find the possible values of k.

1e
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1 mark

The gradient of the graph of y space equals space straight f left parenthesis x right parenthesis at the pointspace left parenthesis 2 comma space 12 right parenthesis spaceis negative 4.

Write down the coordinates of the other point on the graph of y space equals space straight f left parenthesis x right parenthesis where the gradient is negative 4.

 (....................... , .......................)

1f
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6 marks

i) The equation straight f left parenthesis x right parenthesis space equals space x squared can be written as space x cubed space plus space p x squared space plus space q space equals space 0.

Show that space p space equals space minus 1 spaceand q space equals space minus 20.

[2]

ii) On the grid, draw the graph of  y space equals space x squared space for  – 4 space less-than or slanted equal to space x space less-than or slanted equal to space 4.   

[2]

iii) Using your graphs, solve the equation space x cubed space space – space x squared space space – space 20 space equals space 0.

 

x = .............................................. [1]

iv)

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The diagram shows a sketch of the graph of y space equals space x cubed space space – space x squared space space – space 20. P is the point left parenthesis n comma space 0 right parenthesis.

Write down the value of n.

n space equals .............................................. [1]

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2a
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3 marks

The table shows some values for y equals x cubed plus 3 x squared plus 2.

x

-3.5

-3

-2.5

-2

-1.5

-1

-0.5

0

0.5

1

1.5

y

-4.1

 

5.1

6

5.4

4

2.6

 

2.9

 

12.1

Complete the table.

2b
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4 marks

On the grid, draw the graph of y equals x cubed plus 3 x squared plus 2 for negative 3.5 less or equal than x less or equal than 1.5 space.

cie-igcse-2019-may-jun-1-q2-2
2c
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1 mark

Use your graph to solve the equation x cubed plus 3 x squared plus 2 equals 0 for negative 3.5 less or equal than x less or equal than 1.5 space.  

x = ....................................................

2d
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2 marks

By drawing a suitable straight line, solve the equation x cubed plus 3 x squared plus 2 x plus 2 equals 0 for negative 3.5 less or equal than x less or equal than 1.5 space.  

x = ....................................................

2e
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1 mark

For negative 3.5 less or equal than x less or equal than 1.5 space comma the equation x cubed plus 3 x squared plus 2 equals k has three solutions and k is an integer.

Write down a possible value of k.  

k = ....................................................

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3a
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2 marks

The table shows some values of  y equals x cubed minus 3 x minus 1.

x

-3

-2.5

-2

-1.5

-1

0

1

1.5

2

2.5

3

y

-19

-9.1

 

0.1

1

-1

-3

-2.1

1

7.1

 

  Complete the table of values.

3b
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4 marks

Draw the graph of  y equals x cubed minus 3 x minus 1  for  negative 3 less or equal than x less or equal than 3.

cie-igcse-2018-oct-nov-p4-tz2-q5b
3c
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5 marks

A straight line through (0, –17) is a tangent to the graph of  y equals x cubed minus 3 x minus 1.

i) On the grid, draw this tangent.    

 

[1]

ii) Find the co-ordinates of the point where the tangent meets your graph.   

 

(................ , ................) [1]

iii) Find the equation of the tangent. Give your answer in the form  y equals m x plus c.  

 y = ................................................ [3]

3d
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4 marks

By drawing a suitable straight line on the grid, solve the equation  x cubed minus 6 x minus 3 equals 0.  

x = ................... or x = ................... or x = ...................

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