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# OCR FP1 (not MEI) jan 20th watch

1. How did everybody find this exam then?
2. SO MUCH NICER THAN THE JUNE 2009 PAPER. =P

Ahem.
3. fond it easy but made one silly mistake
4. sum to infinity from 2 = sum to infinity from 1 - sum to 1 from 1

i aciddently put sum to 2 from 1 instead of 1 to 1

i got 1/9 instead of getting 1/4
anyone else with that mistake
5. hello?
7. probably 62 to get 80 ums, 68 to get 90 ums.
by the way did anyone make the same mistake i did (read previes entries)
8. What did people get for the values of x, y and z? Im pretty sure i got it wrong
9. I'm just typing up the answers.
10. OCR (NOT OCR MEI) FP1 ANSWERS JAN 2010

1. (i) (2 marks)

(ii) a = 1.5 (3 marks)

2. (i) (3 marks)

(ii) 4 (2 marks)

3. z = 2 + 5i (5 marks)

4. (6 marks)

5. (i) Rotation 90 degrees anticlockwise about origin (2 marks)

(ii) S is reflection in x axis

(4 marks)

6 (i) x = -2 (3 marks)

(ii) p = -8 and q = 52 (4 marks)

7. (i) Show ... (1 mark)

(ii) (4 marks)

(iii) 0.25 (2 marks)

8. (i) a = -3 + 2i or a = 3 - 2i (5 marks)

(ii) Sketch (4 marks)

9. (i) (7 marks)

(ii)

(4 marks)

10. (i)

(3 marks)

(ii) (1 mark)

(iii) Induction (4 marks)

(iv) Shear parallel to x axis where the image of (0,1) is (20,1) (3 marks)

Edited to correct the sum to infinity.
11. (Original post by Mr M)
I'm just typing up the answers.
do you think youy could do the same for the core 3 (not MEI)paper?....
I will rep you, if that helps?......
12. (Original post by DR_X)
do you think youy could do the same for the core 3 (not MEI)paper?....
I will rep you, if that helps?......
13. Mr M, i hesitate to say it, but i think you're got 7. iii) wrong!!
correct me if im wrong!
14. (Original post by hellopoppet)
Mr M, i hesitate to say it, but i think you're got 7. iii) wrong!!
correct me if im wrong!
Ah-ha my answer is the sum from 1 to infinity!
15. would that be the sum to infinity question?
16. The argand diagram, was it a bisector or 2 circles?
17. The correct answer is 1/4.
18. i mean i got it as 0.25
19. (Original post by Mr M)
I think so!
20. Anything else people want me to check on? I did do it in 30 mins so there could be other mistakes.

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