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

last answer was k<-7.5 right? and what about the second to last question was stuck on that for ages, I ended up getting 3-+root21/2 or something for x but couldn't figure out how to get y

I got the same as that apart from for 4 where i got y=22/7

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

2 and -1/2 ?

You have got question 1ii wrong it was + or - 27

Does anyone think that the grade boundaries might be slightly lower than usual?

On the last question i got k > 3/2
6^2 - (4x3(3+k)) < 0
36 - 24 - 8k < 0
12 -8k < 0
k > 12/8 simplified to 3/2?

no it was 27

Feel free to contribute to the unofficial mark scheme: https://docs.google.com/document/d/1GrOwL3hZzhJmn8rd9IyozRJX6e6-0fAlwbaEnJkJEnw/edit?usp=sharing

It was 36--24 +8k <0
So k<-60/8

It was 36--24 +8k <0
So k<-60/8