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Edexcel C4 June 2016 - Unofficial Markscheme

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I tried 3b after getting 3a wrong should I still get error carried forward marks?
Original post by Waffles15
literally the same as me ahah..except i did have time to find the E coordinates...just did it wrong :tongue:


reckon we've got 64/65 maybe you got a bit extra for trying to find E's,

May have lost the A* chance with that now, i reckon i got 70 in c3 so probs not quite enough i don't think
Reply 142
Avatar for Examlyf
Examlyf
Original post by Anon-
How did you guys do 7b)? where you have to find the volume of revolution


so you had to find the volume of the cylinder then subtract the volume of the integral of 17/2 to 1/2
what was q6b?
Original post by ImNervous
Please can someone help me

On Q3 I forgot the minus 2 and got an answer of 6/22+π instead of 8/22+π. This lead to my next part being wrong also. Bow many marks do you think I'll loose. All of them? Thanks

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hope not, thats exactly what i did..where did the minus 2 come from?
Original post by ProfessorNick
I tried 3b after getting 3a wrong should I still get error carried forward marks?


So did I! I imagine we'll get method marks but lose the accuracy marks
I'm working on a worked solutions mark scheme if anyone is interested.
Reply 146
Avatar for robNikh
robNikh
hi does anybody know the marks for the final two parts of question 8?
Original post by izzyrut
Anyone know how many marks 2b was worth? (Trapezium rule)

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3 marks i think
Original post by dr-jekyll
i don't remember getting the Q4 part a answer. But I did get 633 for b. Does this mean I must have gotten part a right as well? Like was b dependent on a? Because I may or may not have gotten it right, just don't remember.


You needed a to get part b so you must have done.
Reply 149
Avatar for lm4058
lm4058
What did the question ask in 8c where k=2?
Original post by Mattematics
You needed a to get part b so you must have done.


Oh thank God.

Also, thank you :smile:
Original post by lm4058
What did the question ask in 8c where k=2?


Length of AP.
Was Q 8c) meant to be finding cos(theta)? I found theta instead as 36ish. I did one line of working which was "cos(theta) = some horrible surd" then just wrote theta on the next line, will I still get full marks without simplifying cos(theta)?
Original post by lm4058
What did the question ask in 8c where k=2?


distance AP
(edited 7 years ago)
Reply 154
Avatar for plhg98
plhg98
1
How many marks was 3b worth?
How many marks for each part of Q7? I thought there were only 2 parts?
HOW MANY MARKS WILL I LOSE FOR THE TIME QUESTION WHERE I SAID X = 40 instead of 20??
Original post by MathsAndChess
I'm working on a worked solutions mark scheme if anyone is interested.


yes please
Reply 158
Avatar for Synn
Synn
1
For 6)b for 3ln(3y+2)−2lny+c 3ln(3y+2)-2lny +c how many marks would i lose if i simplified it even further using c=ln(k)c = ln(k) which would then get me ln(k(3y+2)3y2) ln\left(\frac{k(3y+2)^3}{y^2} \right)
(edited 7 years ago)
Original post by Hineshtailor
HOW MANY MARKS WILL I LOSE FOR THE TIME QUESTION WHERE I SAID X = 40 instead of 20??


You'll either get 1 or none dependent on whether the Mark Scheme allows for a correct method with incorrect values. I'd lean closer to none though, sorry.

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