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# AQA Core 2 Maths prep. thread (25/05/16) watch

1. (Original post by Rahee_Ali)
What did you guys get for the Binomial Expansion last part? I got a negative 4 digit number, can't remember the no. though.
-1552 or along those lines?
2. (Original post by Jjohnson919)
-1600 and something (remember exact number)
I think I got a lower number 😂 crap
3. (Original post by rainbowtwist)
Where is 1/5 from?
EDIT: just realised 1/5 is 0.2 lols
Also I put it was a stretch in y by scale factor 1/25 😂😂
you are not alone :P
4. Hi everyone just to say ive made a core 2 discussion and unofficial mark scheme thread here where people can see/input answers so we can build an unofficial mark scheme http://www.thestudentroom.co.uk/show...3#post65151203
5. what did everyone get for the sum of the number of terms?
6. (Original post by Rahee_Ali)
I think I got a lower number 😂 crap
I got -1648 ??
7. (Original post by voltz)
I got -1648 ??
Pretty sure i got the same thing
8. -1648

(Original post by Jjohnson919)
-1600 and something (remember exact number)
9. (Original post by SunDun111)
what did everyone get for the sum of the number of terms?
The sigma notation from n=4 to 21? I got 90? Did anyone else get that
10. For the binomial I used the c4 method to fully expand whatever the quadratic was - (2+x)^7 ?

Problem is I completely forgot to times each answer by 2^7 although I did take it out the brackets and write it.

I then used the indices pairings from both expansions and multiplied any thats powers would add to 10.

How many marks would I lose?
11. what was the answer for first question part a
12. I got -1552 for the expansion
13. (Original post by Excuse Me!)
For the binomial I used the c4 method to fully expand whatever the quadratic was - (2+x)^7 ?

Problem is I completely forgot to times each answer by 2^7 although I did take it out the brackets and write it.

I then used the indices pairings from both expansions and multiplied any thats powers would add to 10.

How many marks would I lose?
i did the same as you! absoutley gutted, i am alwso wondering how much marks i'd get for it
14. (Original post by tsr1807)
The sigma notation from n=4 to 21? I got 90? Did anyone else get that
Yeah, I got 90!
15. (Original post by Rahee_Ali)
What did you guys get for the Binomial Expansion last part? I got a negative 4 digit number, can't remember the no. though.
I got -1648, I think.
16. (Original post by SunDun111)
i did the same as you! absoutley gutted, i am alwso wondering how much marks i'd get for it
Haha, its really annoying. I wrote 2^7 and remember thinking i must do that later.

If i had to guess i would say 3 marks mabye 4 but most likely 3.

For, correct terms within expansion, correctly using indice rules to find coefficients, adding coefficients we got to get an answer.

so hopefully 3
17. How did you all find it in comparison to
1) core 1
2) all the past papers for c2??

I think this was easier than c1 but harder than most c2 papers but easier than June 2012 😂But I think it went ok overall
18. (Original post by RueXO)
How did you all find it in comparison to
1) core 1
2) all the past papers for c2??

I think this was easier than c1 but harder than most c2 papers but easier than June 2012 😂But I think it went ok overall
I did surprisingly bad on the C1 paper, and this was much better personally.

I still messed up quite a few questions like the radian trig one, the arithmetic sum and the area of the sector one.
19. What do we think the grade boundaries will be, usually the average is about 58/59
20. (Original post by ShitAlevels)
What do we think the grade boundaries will be, usually the average is about 58/59
I would like to think a little lower, so around 56/57. Was definitely a hard paper.

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