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Edexcel Core 3 - 21st June 2016 AM

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Original post by Pablo Picasso
83-84


Really ? So A* would be like 71/75 ish
Original post by 83457
For question 4a (the one with the modulus graph), for y = 0, I wrote x = 0.5ln(6.25), not noticing that 6.25 can be rooted to 2.5. How many marks was that? Will I get full marks for that one, or do those questions typically require a simplified answer?

Also, how did people find that compared to the June 2015 and June 2013 paper? Those are the ones I didn't do for prep, so I can't judge


Definitely easier than the 2015 paper
I split into 2Cos2x/Sin2x and used to Cos^2x - Sin^2x for cos double angle, along with dividing and simplifying the Sin double angle. Have a try? It should work.
image.jpg
the long division way
Original post by itsarchie
Was anyone able to prove that the root of g(x) was α=1.473 to 3dp?


Yeah you do use the equation 4e2x - 25 - 2x - 43. That would give you an a positve and negative answer. Around -0.08 and 0.08 i think it was.
Original post by Doyle2K
Anyone have an idea of what the boundary for an A* will be like?


Original post by victoria98
Anyone know what an A* is usually?


69-70
Original post by Snasher350
Really ? So A* would be like 71/75 ish


100% doubt that, it'll be similar to last year.

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could someone tell me what the question was for 4b please?
Original post by Snasher350
Really ? So A* would be like 71/75 ish


No it would certainly not be 83 ums for 67/68

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Original post by Snasher350
Really ? So A* would be like 71/75 ish


around 70/69
No grade boundaries will be similar to last years


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Original post by midgemeister7
No it would certainly not be 83 ums for 67/68

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seconded

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Original post by Ainsleyy
Seriously you might be surprised most of my friends missed the grades for their uni but all got in. Just relax and try your hardest for C4 :smile:



what were their offers?
Think I could of potentially got 100% finally after dreadful further maths exams
Original post by mangoli
image.jpg
the long division way


Fml
Original post by Ryan105
Proof for tanx question. Couldn't do part b) in exam but just realised how to :frown:, so will post in a bit
IMG_0698.jpg


I used the double angle for sin and cos and used tan2x as a fraction of that and simplified. It seemed to work.
For the question with the simplifying fractions (I think it was 8), does this method work?

(x^4 + x^3 - 3x^2 + 7x - 6)/(x^2 + x - 6) = x^2 + A + B/(x-2)

If x = 0,

-6/-6 = A - B/2

If x = 1

0 = 1+A- B
B = A+1

1 = A + (A+1)/(-2)
-2 = -2A + A + 1
-3 = -A
A = 3
So B = 3+1 = 4
(edited 7 years ago)
Reply 1677
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Anon-
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Original post by jshep000
Not really there were 2 ways you could have done it you melt, was referring to how we got exact answers earlier on in the thread as we discussed them.


i like big KoK in my bum
Will 73 be 100 ums guys?
How many marks was 8b??

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