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Edexcel S2 June 2014 Question 2 b)

https://qualifications.pearson.com/content/dam/pdf/A%20Level/Mathematics/2013/Exam%20materials/Question-paper-Unit-S2-(6684)-June-2014-v2.pdf

https://qualifications.pearson.com/content/dam/pdf/A%20Level/Mathematics/2013/Exam%20materials/Mark-scheme-Unit-S2-(6684)-June-2014.pdf

https://qualifications.pearson.com/content/dam/pdf/A%20Level/Mathematics/2013/Exam%20materials/Examiner-Reports-Unit-S2-(6684)-June-2014.pdf

I am not sure how to get the second mark for part b). I know you integrate to get t/6 – t^3/1458. The mark scheme simply rewrites the CDF given in the question. The examiner report makes it clear that students only get 1 mark for the integration.

Do I just have to rewrite the CDF in my answer to get the second mark?

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Avatar for HumzaAhmed
HumzaAhmed
OP
10
Original post by Tankinator
You're all wrong. 1=0 and here is the proof.

1: let x=5

2: x = 1 + 1 + 1 + 1 + 1

3: x^2 = x + x + x + x + x (Multiply both sides by x)

4: d/dx (x^2) = d/dx (x + x + x + x + x) [Differentiate both sides]

5: 2x = 1 + 1 + 1 + 1 + 1 [Result of differentiation above]

BUT since : x = 1 + 1 + 1 + 1 + 1
use part 5 and part 2 to get

6: 2x = x
7: 2 = 1 (Cancel the x's)
8: 1 = 0 (subtract 1 from each side)

Therefore I have successfully proven that 1 is equal to zero. Everything you have been told about maths, addition and numeracy is therefore incorrect and the world as you know it ceases to exist. You are welcome

tf is this? get your spam outta here I got S2 exam to prepare for
Original post by HumzaAhmed
https://qualifications.pearson.com/content/dam/pdf/A%20Level/Mathematics/2013/Exam%20materials/Question-paper-Unit-S2-(6684)-June-2014-v2.pdf

https://qualifications.pearson.com/content/dam/pdf/A%20Level/Mathematics/2013/Exam%20materials/Mark-scheme-Unit-S2-(6684)-June-2014.pdf

https://qualifications.pearson.com/content/dam/pdf/A%20Level/Mathematics/2013/Exam%20materials/Examiner-Reports-Unit-S2-(6684)-June-2014.pdf

I am not sure how to get the second mark for part b). I know you integrate to get t/6 – t^3/1458. The mark scheme simply rewrites the CDF given in the question. The examiner report makes it clear that students only get 1 mark for the integration.

Do I just have to rewrite the CDF in my answer to get the second mark?



The question says "show that", i.e. it's asking you to prove that the CDF is the function given. Thus you get 1 method mark for attempting to integrate, and 1 answer mark for completing the proof by writing down the CDF with correct inequalities.

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