C4 June 11 Edexcel - MODEL ANSWERS AND PAPER NOW IN FIRST POST

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i would say nailed on

arsey, on question 8, i did everything the same, but i managed to put a 2 infront of the (4y+3)^0.5 thus my C value was slightly different. but i did all methof identical, what would i be looking at out of 6? 3 or 4 maybe?

Reply 2701

MattyC93

Original post by akbawan

hey u no for the binomial question
why was it not possible to sqaure root the bottom bit of the fraction and then raise to the power of minus one?

I think Arsey answered this for me

Reply 2702

heymynameisben

Original post by Arsey

model answers are now in the first post. Last attachment in the list

Thanks so much for what you do. Thought I may as well get my questions out of the way and I'm sure a lot will want to know this. For question 2 I didn't think you could expand with x^2 so I wrote out the equation and did it for 3+ 2x even though I knew it was wrong. Can I expect any marks at all? Also a bit less important I did the vector length with tan instead of sin (kicking myself) how many marks will I lose if all prior working was correct? Thanks in advance

Reply 2703

Arsey

Original post by akbawan

hey u no for the binomial question
why was it not possible to sqaure root the bottom bit of the fraction and then raise to the power of minus one?

9 + 4x^2 is not (3 + 2x)^2

Reply 2704

Rahul.S

Original post by TwilightKnight

Do you actually try to be obnoxious or does it just come naturally?

looooooooooooooooool......how am i being obnoxious? its hard to remember answers for c4.... :colone:

Reply 2705

Phenylethylamine_

I reckon I got 69/75, how much UMS do guys think that is? :smile:

Reply 2706

20100

Original post by Arsey

Gibbo is doing FP2, I am doing FP1

Arsey, how many marks would I lose if i left the area of R as 2ln2 + 1, ie forgot to multiply the 1/2 ?

Reply 2707

Chawlie14

Original post by JK471993

My heart has just stopped. I missed question 8! Where was it?

please tell me you are joking :|

Reply 2708

fisher.n

Original post by fruktas

It was sucha nice paper! Not too simple, actually required some workings. I was checking the solutions, and Arsey, your +c on the left hand side freaked me out for a moment , I thought I got it wrong :biggrin:

so is c plus 1 on the right hand side?!

Reply 2709

sportycricketer

Couldn't c for the last question be +1 cos it depends on where you put the + c after integration?

Reply 2710

lou12

Original post by Arsey

yes you can not root it.

9 + 4x^2 is not (3 + 2x)^2

i forgot to changes the limits on q7c, but got the integration bit right, how many marks Arsey?

Reply 2711

josh9294

Wow, I am SO surprised everybody found this relatively easy!

EVERYBODY in my class and the year above said this paper was by far the hardest they've done. Harder than the solomon papers.

Reply 2712

Arsey

Original post by 20100

Arsey, how many marks would I lose if i left the area of R as 2ln2 + 1, ie forgot to multiply the 1/2 ?

2 prob, I would say

Reply 2713

aadamali

Fairly easy paper, I was havin sleepless nights ppl tellin me it's gona be a nightmare after the mickey mouse jan paper.

Reply 2714

saad6191

hey arsey if i got the first part for the differential equation last ques, how many marks will ilose if i did everything else right?
I loveee you by the way, just awesome u are

Reply 2715

Legendary

72~74/75. :P

Only needed 80 though. :biggrin:

Reply 2716

jubrilaya

Was hard, luckily all i need is 80% for an A* helps beasting c3 :wink:

Reply 2717

ViralRiver

I think I've got 75 in this, looks like I've done everything right. But just in case... what do you expect grade boundaries to be?

Reply 2718

RobG93

Arsey, my two possible mistakes:

On the integration by substitution question I left my answer as 1/2 - ln1/2, will I still get the marks since it adds to the same value as 1/2 +ln2?...?

And on the vectors question I worked out AB wrong, I did A-B instead of B-A, schoolboy error i know, but for the modulus therefore I got 2root 11 instead of 2root14.... i used 2root11xsin69.1 and got an answer of 6.2, instead of 6.99.. i drew a diagram too, so how many marks will i lose for this?

Thank you.

Reply 2719

*QueenBeee