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# Maths Ocr 2016 C1

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1. (Original post by duncant)
no bobby is right, go to https://www.desmos.com/calculator and copy/paste y=x^2\left(3-x\right) and y=\left(x-2\right)^2\left(5-x\right) into the left side.
/Users/alfiehowell/Desktop/Screen Shot 2016-05-18 at 12.51.09.png

The curve hasn't been just shifted though?
2. Anybody agree that this was BY FAR the hardest C1 paper ever produced?
3. Yep definitely

(Original post by PeteM)
Anybody agree that this was BY FAR the hardest C1 paper ever produced?
4. This looks like the correct graph to me, hence the answer was (x-2)^2(5-x)

5. Think these were the questions
6. What did oeople get for the simultaneous equatipns one , not the 1/16 and 81 one ?
7. What do you guys think the grade bounderies will be and do yoiu guys think the C2 and S1 paper will be as hard as this?
8. (Original post by Bobby21231)
I got 50.25 how about you
I got this too!!
9. for the disguised quadratic substitution I got values of 3 and 1/2 but squared instead of ^4 - how many marks do you think I will lose?
10. What on earth was that?!
11. Can anyone remember the quadratic substitution question?
12. (Original post by Bobby21231)
I got 50.25 how about you
I got 50 but I really wasn't sure of it
13. (Original post by phat-chewbacca)
Can anyone remember the quadratic substitution question?
I put x equal to y^1/4 and i got y=1/16 and 81
14. How did you do the tangent to the circle at A question? Got that really wrong...
15. Anyone remember the answers /or the question itself to the simulatenous equation one
16. Grade boundary discussion. What are we all thinking? I reckon 61/72 for an A.
17. Guys the answer to the last question was 27, but for some stupid reason, I left the answer as:

8 x (√27/12)^3

Now, I checked on my calculator, and it is equal to 27, but I'm not sure about whether my form is acceptable. My intermediate working was all right, so do you think that they will dock marks, and if so, how many?
18. (Original post by AlfieH)
Grade boundary discussion. What are we all thinking? I reckon 61/72 for an A.
I think (and hope) it'll be in the high fifties for an A
19. Indices: Q5 pt 2:
2^13/2
Because:
it was 8(2^4/3) = 2^3 x 2^4/3 = 2^13/3.
Quite sure its correct as lots of people around me got the same answer

Got 27 for last Question, although i left it as a surd.

Im also sure the radius was 0<r<=2
As when you put y=0 into the circle equation, you got x=-2
Given the centre of the mini circle was at the origin, and had to be within the larger circle, the furthest it could have been was 0 -> -2 giving it a radius of 2 or less? It was only 2 marks so I cant see how it would be more complex than that?

Hoping grade boundaries low (56-58), definitely much harder than past papers. Everyone was of the same opinion, few of further maths kids didnt finish it and theyre the 100UMS type.
20. What was the actual question about the y-coordinate of the normal to the curve??

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