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# OCR MEI - C1 - 13th May 2015 watch

1. (Original post by TurkeyKnobblers)
Am I the only one that found this question really easy?
Don't you just use b^2-4ac and see where it is greater than 0?
2. (Original post by TurkeyKnobblers)
Am I the only one that found this question really easy?
Omg I did as well! I figured it out as soon as I started working through it

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3. yep (-2,1) was the minimum point for the last question. you needed it for the last question to work out K btw that's was 5
22 root 2 was also right
(0,3) was right and so is (0,7). you worked it out by putting x and y equal to 0 separately to find X and Y respectively.
question 12(i) required you to find K by putting the quadratic equal to Zero. and solving to find K
4. Question Paper, courtesy of Nels98: http://www.thestudentroom.co.uk/show...819&p=55753987
Props to Mathbomb for writing this with me

1. (2 marks)

2.
Intersection with axes:
(0, 10), (-2.5, 0)
(5 marks)

3a. 1 (1 mark)

b. 0.6 (3 marks)

4. (3 marks)

5. (7/8,19/8) (4 marks)

6a. (3 marks)

b. (2 marks)

7. (4 marks)

8a. Use Pythagoras (2 marks)

b. (3 marks)

9a. False because rhombuses/kites can have diagonals intersecting at 90 degrees. Should be => (2 marks)

b. False; many examples where is an integer and is not, e.g. so , which isn't an integer. Should be <= (2 marks)

10a. Should hit x-axis at -3, 2 and 5, y-axis at 30 (3 marks)

b. Expand brackets (2 marks)

c. Translation by the vector
(2 marks)

d. (5 marks)

11a. centre is (10,2), (2 marks)

b. A(-1, 0), B(21, 0), D(0, -3), E(0, 7) (4 marks)

c. (6 marks)

12a. (5 marks)

b. (5 marks)

c. (2 marks)

Enjoy, hope you all got what you wanted!
5. (Original post by Kira Yagami)
Did any one get fractional answers for the point of intersections on question 4 I think it was.

Did someone put 22 ROOT 2 for the surd question.

Did people get -2,1 for the minimum point on the last question.
Yup to all of those but I may have got the fractions wrong. My friend got different answers and I didn't have a chance to ask around.
6. you need the use the discriminant (b^2 - 4ac<0) to determine the fact that it doesn't cross the x axis
7. (Original post by JamesExtra)
Don't you just use b^2-4ac and see where it is greater than 0?
Yeah exactly that, answer came out to be 14/3 when simplified.
8. (Original post by DOPECYCLIST)
yep (-2,1) was the minimum point for the last question. you needed it for the last question to work out K btw that's was 5
22 root 2 was also right
(0,3) was right and so is (0,7). you worked it out by putting x and y equal to 0 separately to find X and Y respectively.
question 12(i) required you to find K by putting the quadratic equal to Zero. and solving to find K
Can you make a mark scheme with questions and answers on? Think everyone would appreciate it 😄
9. (Original post by DOPECYCLIST)
anybody want me to make an unofficial markscheme?
Yes please, praying to god for 98-100UMS on this!

Anyone doing FP1 tomorrow?
10. Does anyone know the mark normally needed for 100 UMS?

I'm guessing 72, right?
11. (Original post by robin168)
Yes please, praying to god for 98-100UMS on this!

Anyone doing FP1 tomorrow?
Yeah, I quite like FP1 since much like Core 1 they almost always have the same questions just slightly different on every paper.
12. Wait I thought for the one being above the x axis you work out te min y value and show its greater than 0.

At least that's what I've seen on past mark schemes?
13. What ums would 70/72 roughly be?

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14. yh i typed the thing the wrong way round. It acc needs to be b^2 -4ac >0
15. What's the grade boundary for an A for edexcel?
16. Guys what was the equation that you had to complete the square on??
17. (Original post by TurkeyKnobblers)
Yeah exactly that, answer came out to be 14/3 when simplified.
By that you mean k>14/3 ? That's what I got

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18. check the unofficial mark scheme, if you don't get the answers you are wrong m8
19. (Original post by Bruhh)
Yeah, I quite like FP1 since much like Core 1 they almost always have the same questions just slightly different on every paper.
I completely agree, i absolutely love when they give you 14marks for the graph questions! Just praying that the induction question isnt too tricky!
20. (Original post by JamesExtra)
Guys what was the equation that you had to complete the square on??
I think.... 3x^2+12x+13?

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