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[Official Thread] OCR MEI AS Mathematics 2016 (C1, C2 & S1)

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Original post by Kira Yagami
For the one where you had to translate the graph, you shifted it 3 units to the right parallel to the x axis right

for the coodinates of intersection did you put (2, 0.21) or something


I put x=1.9 y=0.3 as the estimate, my line wasnt the bes but I think if you are within a couple of decimal places then its fine
Hey, how many marks would i get if i put k > -15/2, I think thst what i put so would i only lose one mark for the incorrect inequality?
Original post by ionic285
I put x=1.9 y=0.3 as the estimate, my line wasnt the bes but I think if you are within a couple of decimal places then its fine


There was one where you had to find the intersection with the axis (the last question part i)

I got something like 1,0 , 1.5,0

and intersects y at 0,-3
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Original post by Grindle97
Hey, how many marks would i get if i put k > -15/2, I think thst what i put so would i only lose one mark for the incorrect inequality?


If you showed sufficient working I think you'd get all marks but one.
I'm just going to list my answers to see if people agree with them.... (They may not be in the exact order and I may have fOr gotten some, but I will try and write down the question bit too)
1. 3^0= 1
9^3/2 =27
(4/5)^-2= 25/16
2. (1-2x)/4>3 = x>-11/2
3. (5c^2d)^3 / (2c^4)/ d^5 = 250c^10d^-2


4. One with intercepts of two lines x=9/7 and y=22/9
5. Root 50 + 2root8= 11root2


ii. Other surds question= 2+root3

6.
Remainder of f(2) is 11 remainder of (x+1) is 11 f(x)= x^3+ax+c
A=-2 and c=7

7. Expand (1-5x)^4
1-20x+150x^2- 500x^3 + 625x^4

8. Find minimum and then Sketch graph of (x-2)^2=9
Minimum at (2,-9)
Crosses x axis at -1 and 5 and y axis at -5
Original post by Octavian_190
I'm just going to list my answers to see if people agree with them.... (They may not be in the exact order and I may have fOr gotten some, but I will try and write down the question bit too)
1. 3^0= 1
9^3/2 =27
(4/5)^-2= 25/16
2. (1-2x)/4>3 = x>-11/2
3. (5c^2d)^3 / (2c^4)/ d^5 = 250c^10d^-2


4. One with intercepts of two lines x=9/7 and y=22/9
5. Root 50 + 2root8= 11root2


ii. Other surds question= 2+root3

6.
Remainder of f(2) is 11 remainder of (x+1) is 11 f(x)= x^3+ax+c
A=-2 and c=7

7. Expand (1-5x)^4
1-20x+150x^2- 500x^3 + 625x^4

8. Find minimum and then Sketch graph of (x-2)^2=9
Minimum at (2,-9 4 which i got y=22/7
Crosses x axis at -1 and 5 and y axis at -5


I got the same as that apart from for 4 where i got y=22/7
Original post by Tyler213
Got wrong final answer to the last question but still used the discriminant, how many marks will i lose? 1?


I think they give 1 or 2 marks for the discriminant.
For the second surds one, what was the question again?
How many marks was the last question cos i got k <-3/2. Also how many marks dyu think i will lose for forgettting to find the point of intersection
Original post by Octavian_190

7. Expand (1-5x)^4
1-20x+150x^2- 500x^3 + 625x^4



It said expand as simple as possible so I thought you're supposed to leave it still with the brackets
For the tangent to the circle I got 2y=2x+12

I think
For the tangent to the circle I got 2y=x+12

I think
https://docs.google.com/document/d/1GrOwL3hZzhJmn8rd9IyozRJX6e6-0fAlwbaEnJkJEnw/edit?usp=sharing

Unofficial mark scheme (WIP).
Original post by Grindle97
I got the same as that apart from for 4 where i got y=22/7


Yes it should be y=22/7 (typo)
Original post by Octavian_190
I'm just going to list my answers to see if people agree with them.... (They may not be in the exact order and I may have fOr gotten some, but I will try and write down the question bit too)
1. 3^0= 1
9^3/2 =27
(4/5)^-2= 25/16
2. (1-2x)/4>3 = x>-11/2
3. (5c^2d)^3 / (2c^4)/ d^5 = 250c^10d^-2


4. One with intercepts of two lines x=9/7 and y=22/9
5. Root 50 + 2root8= 11root2


ii. Other surds question= 2+root3

6.
Remainder of f(2) is 11 remainder of (x+1) is 11 f(x)= x^3+ax+c
A=-2 and c=7

7. Expand (1-5x)^4
1-20x+150x^2- 500x^3 + 625x^4

8. Find minimum and then Sketch graph of (x-2)^2=9
Minimum at (2,-9)
Crosses x axis at -1 and 5 and y axis at -5


I think this all right except for q4) I got y=22/7
https://docs.google.com/document/d/1GrOwL3hZzhJmn8rd9IyozRJX6e6-0fAlwbaEnJkJEnw/edit?usp=sharing\

Unofficial mark scheme (WIP). Feel free to add comments directly to the document.
Does anyone have the unofficial mark scheme? Think I messed up question 8 I got a=-10 and c=some positive fraction I can't quite remember. I thought this paper was quite hard compared to some of the other past papers I have done
Original post by Kira Yagami
For the tangent to the circle I got 2y=x+12

I think


I'm sure I got 4y=3x+22
Original post by Grindle97
I got the same as that apart from for 4 where i got y=22/7


You got question 2 wrong you have to flip the sign when you multiply through
You have got question 1ii wrong it was + or - 27

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