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Maths Edexcel C12 IAL May 24 2017 Markscheme

How was the paper guys? And what questions did you find difficult? I personally found most of the questions easy .

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Reply 1
Original post by Luj99
How was the paper guys? And what questions did you find difficult? I personally found most of the questions easy .


better than *****y c1
Can anyone post an unofficial mark scheme for this paper?
Reply 3
Original post by giorgos00
what did you find the question with the two circles?


For the the circle equations I got x^2+ y^2=13 and x^2 + y^2 =117 or 17 I can't remember the radius for second equation it's either 117 or 17
Reply 4
but i got 17 and 113 as the radius idk what is right
Reply 5
Original post by raima567
but i got 17 and 113 as the radius idk what is right


I got that too! Could you tell me how did you solve it?
Reply 6
Can someone kindly post the unofficial mark scheme? Thankss.
what do u think the A would be out of 125??
Reply 8
Original post by Rafa199
I got that too! Could you tell me how did you solve it?




Since it said, both circles touch the circle, one circle touches A and another circle touches B
A(1,4)
B(7,8)
and we know the centre for both (0,0)
so one radius is (1^2 + 4 ^2) = 17^1/2
and another radius is (7^2 + 8^2) = 113^1/2
Reply 9
Original post by raima567
Since it said, both circles touch the circle, one circle touches A and another circle touches B
A(1,4)
B(7,8)
and we know the centre for both (0,0)
so one radius is (1^2 + 4 ^2) = 17^1/2
and another radius is (7^2 + 8^2) = 113^1/2

I solved it in the same way. But many people are saying we have to consider circle 1's diameter when calculating the radii of c2 and c3 :frown:
Original post by Rafa199
I solved it in the same way. But many people are saying we have to consider circle 1's diameter when calculating the radii of c2 and c3 :frown:


Idk bro we can only know who's right on results day. Btw are you bangladeshi?
Reply 11
Original post by raima567
Idk bro we can only know who's right on results day. Btw are you bangladeshi?


Yes I am
Paper was cool, what did y'all get for area under the curve question?
I got 51.75

For the last harbour question, I got h = 5.30 meters and time of 7 and 10
Reply 13
Original post by kevandowski
Paper was cool, what did y'all get for area under the curve question?
I got 51.75

For the last harbour question, I got h = 5.30 meters and time of 7 and 10

I can't remember what I got for area under curve but what I did was find the area of curve using integration and then find the area of the small triangle and then add them together. And I also got 5.30m. What did you do for the circle question?
Original post by kevandowski
Paper was cool, what did y'all get for area under the curve question?
I got 51.75

For the last harbour question, I got h = 5.30 meters and time of 7 and 10

No the time was 10 :36 mins and 4:36 mins
Maybe, for the 7 and 10 I just don't remember the minutes

Posted from TSR Mobile
(edited 6 years ago)
For the circle question I didn't do the last C2 and C3 circles part but I got a radius of root 13 I think, my memory is horrible

Posted from TSR Mobile
What was the asymptote for the graph, I just mirrored the graph on the x axis and got an asymptote of y = -10. (Basically just changed all the y coordinates to negative)
Reply 18
Original post by kevandowski
What was the asymptote for the graph, I just mirrored the graph on the x axis and got an asymptote of y = -10. (Basically just changed all the y coordinates to negative)


That's exactly what I did. I got -10 too
Original post by kevandowski
What was the asymptote for the graph, I just mirrored the graph on the x axis and got an asymptote of y = -10. (Basically just changed all the y coordinates to negative)


yes I did the same :smile:

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