Edexcel C3 June 2016 - Unofficial Mark Scheme

Your welcome how did everyone find the exam today question 8 was particularly troublesome but the rest of the questions weren't too bad.

I'd give you full marks if it was up to me. I'll be honest, though, you might not get very many marks.

The second part will have an alternate method in the mark scheme for differentiating the fraction rather than the simplified quadratic. However, if you didn't do this algebraically, 'cheating' by subbing it into your calculator, you might not get any marks for it. The examiner might be a bit mystified as to how you got the normal equation, but you should get method marks for the last bit of part (b). As for the first part, it depends exactly what you wrote - you didn't cross anything out, and the paper is marked from 0 upwards rather than from 75 and penalising mistakes, so you have a good chance of getting method marks if anything you wrote resembled long division or factorisation by sight. You did get the correct answer, and because factorisation by sight is a valid method (and there are some genius mathematicians who could do the full question in their heads), it is possible that the correct answer will score the A marks without working.

Part (a) was worth 4 marks and part (b) was worth 5 marks. I would say your answer could get anywhere between 2 and 6, depending on how the mark scheme is written and which examiner marks your paper. I know that's already probably an unhelpfully large range, and on top of that I have to add the disclaimer that I'm not an examiner or even a teacher, but please don't stress out about it because there's nothing you can do to change it now.

Complete worked solutions attached

New Arsey in the making

Complete worked solutions attached

Thanks, looks like it will have to be ln(5/2) not 0.5ln(25/4).

Doing worked solutions for 5-8 now

It was the differential of sin^2(2x) I believe.

I don't think I can accept that title

you forgot question 3c

I think I should get full for the second part... This is because I wrote the equation with A and B in again, and then differentiated this properly- so even though I didn't get A and B in a legitimate manner, surely they must forget about that (since it was part A) and then give me all of the marks for part b (provided I did everything else right)?
For part a I think I'll get 1 or 2 marks for trying to show a method. hoping for a chilled examiner who gives me full though, haha, but very unlikely.
Thanks!

Q 3C apart from 86 I also got 327
did the question ask for domain of theta

guys am I counting this right? somebody please help me we need 480 ums for an A, I has 251 from AS , that means I need 229 across C3 C4 M1 ? I think I got 55 marks in M1 , same in C3 , does that mean I need 89 ums in C4 to still get an A??? how many marks approximately is 89 ums? can I still get the A? PLEASE help
am reposting until somebody helps me

It asked for the smallest positive value; you only needed 86.1

guys am I counting this right? somebody please help me we need 480 ums for an A, I has 251 from AS , that means I need 229 across C3 C4 M1 ? I think I got 55 marks in M1 , same in C3 , does that mean I need 89 ums in C4 to still get an A??? how many marks approximately is 89 ums? can I still get the A? PLEASE help
am reposting until somebody helps me