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# edexcel C2 23rd May 2018 unofficial mark scheme watch

1. 1) (2,2) and (6,4rt2)
b) r=51.413
2) 128 + 448x +672k^2x^2 +560k^3x^3
b) k=1.5
3) proof
b) a+b=21
c) b=31 a=-10
d) 24x^2 - 34x + 31
4) Area = 8.75
b) Flag area=20.02
c) 26.79
5) centre-(1,-7)
b) r=5rt2
c) y=0 and y=-14
d) x+7y-2=0
6) a=19000
b) U5=12465.9
c) S12=7176
7) y=625056
a) proof
b) x=1/3
8) x=248.6 , 331.4 (degrees)
ii) theta= 0.258 , 2.89 , 3.48 , 5.94
9) A(4,112)
b) (25/4,0)
c) r=79.77
2. (Original post by shivalakhani)
1) (2,2) and (6,4rt2)
b) r=51.413
2) 128 + 448x +672k^2x^2 +560k^3x^3
b) k=1.5
3) proof
b) a+b=21
c) b=31 a=-10
d) 29x^2 - 34x + 31
4) Area = 8.75
b) Flag area=20.02
c) 26.79
5) centre-(1,-7)
b) r=5rt2
c) y=0 and y=-14
d) x+7y-2=0
6) a=19000
b) U5=12465.9
c) S12=7176
7) y=625056
a) proof
b) x=1/3
8) x=248.6 , 331.4 (degrees)
ii) theta= 0.258 , 2.89 , 3.48 , 5.94
9) A(4,112)
b) (25/4,0)
c) r=79.77

(btw I tutor even over Skype msg me for details)
I got the same
3. Isn’t 3(d) 24x^2, not 29x^2?
4. 8ii) Isn’t 6.03 another value?
5. (Original post by sportyegg)
Isn’t 3(d) 24x^2, not 29x^2?
IT IS
6. (Original post by shivalakhani)
IT IS
Haha I see those sly movements
7. (Original post by Tojsagay)
8ii) Isn’t 6.03 another value?
No as its less than 2pi
8. According to JAY PATEL SEM your wrong
9. (Original post by gymcattaylah)
I got all the same!!
you're wrong NOOB
10. (Original post by sdcvbvn)
According to JAY PATEL SEM your wrong
YOU'RE
11. I reckon grade boundaries will be high this year since apparently C1 and M3 were also easy papers
12. Btw does anyone remember how many marks the binomial question was worth?
13. (Original post by shivalakhani)
YOU'RE
According to JAYPATELSEM you're wrong
14. (Original post by sportyegg)
Btw does anyone remember how many marks the binomial question was worth?
4 marks
15. For the circle question can you leave the radius as Root 50?
16. (Original post by SilentStudent.)
4 marks
Thanks! Was that including finding the value of k as well?
17. (Original post by SilentStudent.)
4 marks
For expansion and I think 3 for the value of K
18. (Original post by sportyegg)
Btw does anyone remember how many marks the binomial question was worth?
7 marks
19. (Original post by Eman0161)
For the circle question can you leave the radius as Root 50?
Yea
(Original post by SilentStudent.)
For expansion and I think 3 for the value of K
Okay thanks
20. Cheers
(Original post by shivalakhani)
7 marks

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