Applications of Integration (Edexcel IGCSE Further Pure Maths): Exam Questions

Exam code: 4PM1

2 hours13 questions
1
5 marks
Graph showing a curve crossing the x-axis at points (-1,0), O, (b,0), and (a,0) with shaded area between (-1,0) and (b,0). Diagram not accurately drawn.

Figure 3 shows a sketch of the curve with equation y space equals space straight f left parenthesis x right parenthesis, which passes through the points with coordinates space left parenthesis negative 1 comma space 0 right parenthesis comma space left parenthesis b comma space 0 right parenthesis and left parenthesis a comma space 0 right parenthesis where 0 space less than space b space less than space a.

Use algebraic integration to determine the exact value of the total area of the shaded regions shown in Figure 3.

2a
2 marks

Show that cos left parenthesis A space – space B right parenthesis space – space cos left parenthesis A space plus space B right parenthesis space equals space 2 sin space A space sin space B

2b
1 mark

Hence express space 2 sin space 5 x space sin space 3 x in the form cos space m x space – space cos space n x spacewhere m and n are integers, giving the value of m and the value of n,

2c
4 marks

(i) Find integral 4 sin space 5 theta space sin 3 theta space straight d theta

(ii) Hence evaluate integral subscript 0 superscript straight pi over 6 end superscript 4 sin space 5 theta space sin 3 theta space straight d theta, giving your answer in the form fraction numerator a square root of b over denominator c end fraction where a, b and c are integers.

3a
3 marks

straight f left parenthesis x right parenthesis space equals space 7 space plus space 4 x space – space 2 x squared

Given that straight f left parenthesis x right parenthesis can be written in the form P left parenthesis x space plus space Q right parenthesis squared plus space R where P comma space Q and R are constants,

find the value of P, the value of Q spaceand the value of R.

3b
2 marks

(i) Hence write down the maximum value of straight f space left parenthesis x right parenthesis,

(ii) Write down the value of x for which this maximum occurs.

3c
3 marks

The curve C has equation y space equals space 7 space plus space 4 x space – space 2 x squared

The line l with equation y space equals space 4 space – space x intersects C at two points.

Find the x coordinates of these two points.

3d
5 marks

The finite region bounded by the curve C and the line space l is rotated 360 degree about the x-axis.

Use algebraic integration to find, to 3 significant figures, the volume of the solid generated.

4a
3 marks
Graph showing a shaded region R between curves and the x-axis at point A, with y-axis at point C. Note: Diagram not accurately drawn. Figure 3.

Figure 3 shows part of the curve C with equation y space equals space fraction numerator 1 over denominator 4 x end fraction comma space x space greater than space 0 and part of the curve S with equation y space equals space 2 x squared space comma space x space greater-than or slanted equal to space 0

The curve C and the curve S intersect at the point A

Find the coordinates of point A

4b
7 marks

The finite region R , shown shaded in Figure 3, bounded by the curve C, the curve S and the straight line y space equals space 4 is rotated through 360º about the y-axis.

Find, using algebraic integration, the exact volume of the solid formed.

5
10 marks
Graph showing a curve C intersecting line l with shaded region R. Axes are labelled x and y. Note: Diagram not accurately drawn.

Figure 3 shows part of the curve C with equation y squared equals x minus 1and part of the line l with equation 2 y plus x minus 4 equals 0

The region R, bounded by the x-axis, the curve C and the line l, is rotated through 360° about the x-axis.

Using algebraic integration, find the exact value of the volume of the solid generated.

6a
2 marks

Using a formula (opens in a new tab), show that

cos space 2 theta equals 2 space cos squared space theta minus 1

6b
4 marks

Using a formula (opens in a new tab), show that

cos space 2 theta equals 2 space cos squared space theta minus 1

Hence show that

integral subscript pi over 3 end subscript superscript fraction numerator 3 pi over denominator 4 end fraction end superscript open parentheses 2 space cos to the power of 2 space end exponent theta minus 1 close parentheses   d theta equals negative fraction numerator a plus square root of b over denominator c end fraction

where a, b and c are integers to be found.

6c
8 marks
Graph with two curves, \(C_1\) and \(C_2\), intersecting x-axis at O. Shaded region R between points A and B on horizontal axis \(θ\). Diagram not to scale.

Figure 3 shows part of the curve C subscript 1 with equation y equals 2 space cos squared space theta minus 1and part of the curve C subscript 2 with equation y equals negative cos space theta

Point B is the intersection of C subscript 1 and C subscript 2 as shown in Figure 3

Point Aopen parentheses fraction numerator 3 straight pi over denominator 4 end fraction comma 0 close parentheses is the intersection of C subscript 1 with the theta-axis as shown in Figure 3

Point E open parentheses pi over 2 comma 0 close parentheses is the intersection of C subscript 2 with the theta-axis as shown in Figure 3

The finite region R, shown shaded in Figure 3, is bounded by the theta-axis, C subscript 1 and C subscript 2

Use calculus to find, in its simplest form, the exact area of R

7a
4 marks

straight f left parenthesis x right parenthesis equals 10 plus 6 x minus x squared

Given that straight f open parentheses x close parentheses can be written in the form A left parenthesis x plus B right parenthesis squared plus C where A,B and C are constants,

find the value of A, the value of B and the value of C

7b
2 marks

straight f left parenthesis x right parenthesis equals 10 plus 6 x minus x squared

Given that straight f open parentheses x close parentheses can be written in the form A left parenthesis x plus B right parenthesis squared plus C where A,B and C are constants,

Hence, or otherwise, find

(i) the value of x for which straight f open parentheses x close parentheses has its greatest value

(ii) the greatest value of straight f open parentheses x close parentheses

7c
3 marks

The curve C has equation y equals straight f left parenthesis x right parenthesis

The curve S with equation y equals x squared minus x plus 13 intersects curve C at two points.

Find the x coordinate of each of these two points.

7d
5 marks

straight f left parenthesis x right parenthesis equals 10 plus 6 x minus x squared

Given that straight f open parentheses x close parentheses can be written in the form A left parenthesis x plus B right parenthesis squared plus C where A,B and C are constants,

The curve C has equation y equals straight f left parenthesis x right parenthesis

The curve S with equation y equals x squared minus x plus 13 intersects curve C at two points.

Use algebraic integration to find the exact area of the finite region bounded by the curve C and the curve S

8a
4 marks
Chart with a shaded area, marked S, between curve OA and line l, intersecting at B on a graph with x and y axes. Diagram labelled as not accurately drawn.

The curve S with equation y equals x squared over 4 plus 2 where x greater-than or slanted equal to 0 and the line l with equation 2 y minus x minus 4 equals 0 where x greater-than or slanted equal to 0 intersect at the points Aand B, as shown in Figure 2.

(i) Show that the coordinates of point A are (0, 2)

(ii) Find the coordinates of the point B

8b
4 marks

The finite region bounded by S and l, shown shaded in Figure 2, is rotated through 2 pi radians about the y-axis.

Use algebraic integration to find the volume of the solid generated.
Give your answer in terms of pi

9a
3 marks

Expand open parentheses 1 plus x over 3 close parentheses to the power of negative 3 end exponent in ascending powers of x up to and including the term in x cubed

Where appropriate express each coefficient as an exact fraction in its lowest terms.

9b
1 mark

Write down the range of values of x for which your expression is valid.

9c
2 marks

Express open parentheses 3 plus x close parentheses to the power of negative 3 end exponent in the form P space open parentheses 1 plus Q x close parentheses to the power of negative 3 end exponent where P and Q are rational numbers whose values should be stated.

9d
2 marks

straight f left parenthesis x right parenthesis equals fraction numerator 1 plus 4 x over denominator left parenthesis 3 plus x right parenthesis cubed end fraction

Obtain a series expansion for straight f open parentheses x close parentheses in ascending powers of x up to and including the term in x squared

9e
3 marks

straight f left parenthesis x right parenthesis equals fraction numerator 1 plus 4 x over denominator left parenthesis 3 plus x right parenthesis cubed end fraction

Hence, using algebraic integration, obtain an estimate of integral subscript 0 superscript 0.2 end superscript straight f left parenthesis x right parenthesis   straight d x

Give your answer to 5 significant figures.

10
8 marks
Graph with curve C starting at origin O, increasing in the positive x and y direction. Axes labelled x and y. Figure 2 caption below.

Figure 2 shows the graph of part of the curve C with equation y equals square root of 2 x plus 6 end root
The finite region enclosed by the curve C and the straight line with equation 3 y minus x equals 3 is rotated through 360° about the x-axis.

Use algebraic integration to find the exact volume of the solid generated.
Give your answer in terms of pi

11a
3 marks

Expand left parenthesis 1 minus 8 x squared right parenthesis to the power of negative 1 half end exponent in ascending powers of x, up to and including the term in x to the power of 6 giving each coefficient as an integer.

11b
4 marks

straight g left parenthesis x right parenthesis equals fraction numerator a plus b x over denominator square root of 1 minus 8 x squared end root end fraction where a and b are prime numbers

Given that the fourth and fifth terms, in ascending powers of x, in the series expansion of straight g open parentheses x close parentheses are 20x cubedand 48x to the power of 4 respectively,

find the value of a and the value of b

11c
4 marks

Using the first five terms, in ascending powers of x, in the series expansion of straight g open parentheses x close parentheses

obtain an estimate, to 4 significant figures, of integral subscript 0 superscript 0.2 end superscript straight g left parenthesis x right parenthesis   straight d x

12a
4 marks
Graph showing a circle, \(x^2 + y^2 = 11\), and parabola, \(y = x^2 + 1\). Shaded area R between curves. Points A, B, and centre O marked. Diagram not to scale.

The region R, shown shaded in Figure 2, is bounded by the curve with equation y equals x squared plus 1and the curve with equation x squared plus y squared equals 11

The two curves intersect at the point A and at the point B.

Find the xcoordinate of the point Aand the x coordinate of the point B.

12b
5 marks

The region R is rotated through 360° about the x‑axis.

Use algebraic integration to find the volume, to 2 decimal places, of the solid generated.

13a
3 marks
Graph of the curve \(y = 4 - e^{2x}\) with axes labelled. Points A, O, and B are marked. Note states "Diagram NOT accurately drawn."

Figure 3 shows part of the curve C with equation y equals 4 minus straight e to the power of 2 x end exponent
The curve C crosses the y-axis at the point Aand the x-axis at the point B.

(i) Write down the y coordinate of point A.

(ii) Show that the x coordinate of B is x equals space In space 2

13b
4 marks

The line l is the normal to C at the point B.

Find an equation for l , giving your answer in the form y equals m x plus c

13c
7 marks

The finite region R is bounded by C, l and the y-axis.

Using calculus, find the area of R.
Give your answer to one decimal place.