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Date May 2022 Marks available 4 Reference code 22M.1.SL.TZ1.2
Level Standard Level Paper Paper 1 (without calculator) Time zone Time zone 1
Command term Hence and Find Question number 2 Adapted from N/A

Question

The expression 3x-5x can be written as 3-5xp. Write down the value of p.

[1]
a.

Hence, find the value of 193x-5xdx.

[4]
b.

Markscheme

3x-5x=3-5x-12       A1

p=-12

 

[1 mark]

a.

3x-5xdx=3x-10x12+c             A1A1

substituting limits into their integrated function and subtracting             (M1)

39-10912-31-10112  OR  27-10×3-3-10

=4             A1

 

[4 marks]

b.

Examiners report

Many candidates could give the value of p correctly. However, many did struggle with the integration, including substituting limits into the integrand, without integrating at all. An incorrect value of p often resulted in arithmetic of greater complexity.

a.
[N/A]
b.

Syllabus sections

Topic 5 —Calculus » SL 5.5—Integration introduction, areas between curve and x axis
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Topic 5 —Calculus

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