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# Edexcel Core 3 - 21st June 2016 AM watch

1. Put together an unofficial mark scheme, feel free to comment if I'm wrong anywhere
http://www.thestudentroom.co.uk/show...7#post65974317
2. (Original post by blahblah21)
Correct me if im wrong please (:
are you sure that was the correct solution for y?

i got y=-1/2x+29/2 not 35/2 like you did
3. (Original post by tammymxx)
Edexcel wants beef
No the chief examiner is a vegan
4. Can anyone remember the equation of Q3?
5. (Original post by pauux)
Yeahh for the one with cot x
Was this the one where it was like x < -5^1/2 , x > 5^1/2 ?
6. (Original post by mk_98)
What did everyone get for the value of k (asymptote) on the graph. I got 21
25 I think
7. (Original post by virufa)
[if you'll pardon the pun]
8. (Original post by chloeabeki)
i got 25, think i got 21 for the y intercept though?
same god bless i got it right
9. (Original post by mk_98)
What did everyone get for the value of k (asymptote) on the graph. I got 21
I got 25
10. (Original post by apzoe)
I found it ok. I had to skip some parts but returned at the end and did them all.

Anyone remember exercise 4 last part? Where they ask to show that 1.437 is correct to 3dp. There was no sign change, just an intersection of the 2 graphs...
there is
put the two equations equal to each other then rearrange to make it equal to 0 then you can find a change in sign
11. (Original post by blahblah21)
Q1a, x=6, x=-5
b. a=6
2a. dy/dx = (20-4x^2)/(x^2+5)^2
b. x>rt(5) x<-rt(5)
3a. rt(5)cos(theta +26.57)
b. theta = 33.0, 273.9
c. theta = 86.1
4a. y=21, x=ln(2.5)
y=25 (k=25)
b. Proof
c. x1= 1.4368
x2= 1.4373
d. Show the change in sign. (gradient function)
5i. Turning points: 0.9463
ii. 0.5cosec(4y)
6a. A=3 B=4
b. x+2y-35=0 (or equivalent)
7a. arcsin(x) graph
b. x= -(2+rt(3))/2
8a. Proof
b. x= 0.294, -1.277, 1.865 and 1 more I think
9a. 6.740
b. Proof
c. T = 5ln(2+(2/e))
From what i temembrr i got most of those
12. Ffs edexcel it wasn't that it was hard just too many questions that needed longer to work out, c4 is gonna be horrible

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13. Honestly proofs involving tans and double angles are just time consuming. Like there are 39 identities to pick from
14. (Original post by tulipsinrain)
sameeee
Saaameee 😂
15. 86.1

(Original post by nahmed124)
What was your smallest possible value for theata?
16. How did u lot get 33.something or whatever for the smallest possible value of x, im baffed for tht question, everything else was fine
17. (Original post by tayloryeah)
LOVED IT! (except for some dodgy bits in the last question) will arsey be doing model answers this year?
Nope, not anymore.
18. (Original post by particlestudent)
Please tell me someone used the quadratic formula for one if the trig ones -_-
I completed the square but quadratic formula would work too.
19. (Original post by ebolaboy)
are you sure that was the correct solution for y?

i got y=-1/2x+29/2 not 35/2 like you did
Not too sure its one of the 2, because I remember seeing 32 and 3, so I think 1 of us just read the signs wrong, worst case one of us will lose 2 marks
20. (Original post by khaleesi98)
We don't.
Why don't we?

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