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# Edexcel FP1 Thread - 20th May, 2016 watch

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1. (Original post by LelouchViRuge)
There is no normal series, if you did change it to 13 you'd be adding at the end, which would be incorrect.

To calculate the amount of numbers in any summation, do whatever the n value is subtract the starting value plus 1
Thanks!
2. This might be a stupid question, but on question 1c of exercise 4D please, https://644625398389466aee0063322305...0NRNU0/CH4.pdf why isn't x to xy linear, as I thought it would be since it's only to the power 1?! Thanks
3. (Original post by economicss)
This might be a stupid question, but on question 1c of exercise 4D please, https://644625398389466aee0063322305...0NRNU0/CH4.pdf why isn't x to xy linear, as I thought it would be since it's only to the power 1?! Thanks
A linear transformation is linear if it satisfied where and are column vectors.

Obviously, isn't.
4. Hi, please could anyone explain what is meant by 'orientation is reversed' on exercise 4h question 2c https://doc-00-0g-docs.googleusercon...kZmYTlpUmpNYXM Thanks
5. (Original post by economicss)
Hi, please could anyone explain what is meant by 'orientation is reversed' on exercise 4h question 2c https://doc-00-0g-docs.googleusercon...kZmYTlpUmpNYXM Thanks
Can't view the PDF for some reason.
6. Do the IAL F1 and IAL FP1 papers follow the same syllabus?
7. (Original post by NotNotBatman)
Do the IAL F1 and IAL FP1 papers follow the same syllabus?
More or less, I didn't really see any differences. Then again, I barely read the specification.
8. (Original post by NotNotBatman)
Do the IAL F1 and IAL FP1 papers follow the same syllabus?
Yes, minor differences such as knowing that a quadratic equation equation can be written as and matrix rotations about any angle. That's about it, I think.
9. (Original post by Zacken)
More or less, I didn't really see any differences. Then again, I barely read the specification.

Thank you.

(Original post by aymanzayedmannan)
Yes, minor differences such as knowing that a quadratic equation equation can be written as and matrix rotations about any angle. That's about it, I think.
Isn't the quadratic equation thing in FP1? It's the only method I've been taught although I do know how to use other methods.
10. (Original post by NotNotBatman)

Isn't the quadratic equation thing in FP1? It's the only method I've been taught although I do know how to use other methods.
It isn't compulsory knowledge on FP1 - questions can be done without this formula. However, many questions on IAL are based on this.
11. (Original post by Zacken)
Can't view the PDF for some reason.
Hi, sorry about the links, here's a pic of the question, I'm just not too sure by what they mean by 'the orientation is reversed' on part c? Thank you Attachment 519045519047
Attached Images

12. Hi, please could anyone explain 6c on this paper, how do we know that QP=I and in particular how do we know it's QP rather than PQ? Thanks Attachment 519053519055
Attached Images

13. (Original post by economicss)
...
Does reading this ( http://mathinsight.org/determinant_l...transformation ) help?
14. (Original post by economicss)
...
1. Triangle is transformed to by . Triangle is transformed back to by . The question has simply called . Inverses satisfy .

2. Inverses are commutative so . That is, it doesn't matter which order you pick here, either will work.
15. Thank you, I think so, so is it saying that if one determinant is the negative of another determinant then the orientation of the second determinant is reversed compared to the original determinant?
16. Please could anyone explain how on this paper https://7cba9babeb0db0ff9468853e0b2d...%20Edexcel.pdf question 2, you know that the focus is -3,0 rather than 3,0? Thanks
17. (Original post by economicss)
Please could anyone explain how on this paper https://7cba9babeb0db0ff9468853e0b2d...%20Edexcel.pdf question 2, you know that the focus is -3,0 rather than 3,0? Thanks
Because the fixed point is (-3 , 0). The fixed line is x = 3 so is to the right of the focus and the whole curve is a mirror image of the usual one.
18. There is a question that says:
Given

where is a real constant

find the value of

from the first part.

I've written:

Would I receive full marks for doing it like this?
Markscheme method (no ALT) https://gyazo.com/e1386625d2e22da34152ceb4df8b246a

19. How do I do part ii? I did the summations for the 2n+1 I did (2n+1)(n) + 1 and added this to the summation, but I got the wrong answer.
20. (Original post by NotNotBatman)

How do I do part ii? I did the summations for the 2n+1 I did (2n+1)(n) + 1 and added this to the summation, but I got the wrong answer.
It starts from where as the standard sums start from . So you need to do:

Your error was doing when you should have done .

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