# edexcel C2 23rd May 2018 unofficial mark scheme

#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
14
3 years ago
#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
1
3 years ago
#3
Isn’t 3(d) 24x^2, not 29x^2?
9
3 years ago
#4
8ii) Isn’t 6.03 another value?
2
#5
(Original post by sportyegg)
Isn’t 3(d) 24x^2, not 29x^2?
IT IS
0
3 years ago
#6
(Original post by shivalakhani)
IT IS
Haha I see those sly movements
0
#7
(Original post by Tojsagay)
8ii) Isn’t 6.03 another value?
No as its less than 2pi
0
3 years ago
#8
According to JAY PATEL SEM your wrong
0
3 years ago
#9
(Original post by gymcattaylah)
I got all the same!!
you're wrong NOOB
4
#10
(Original post by sdcvbvn)
According to JAY PATEL SEM your wrong
YOU'RE
1
3 years ago
#11
I reckon grade boundaries will be high this year since apparently C1 and M3 were also easy papers
0
3 years ago
#12
Btw does anyone remember how many marks the binomial question was worth?
0
3 years ago
#13
(Original post by shivalakhani)
YOU'RE
According to JAYPATELSEM you're wrong
0
3 years ago
#14
(Original post by sportyegg)
Btw does anyone remember how many marks the binomial question was worth?
4 marks
0
3 years ago
#15
For the circle question can you leave the radius as Root 50?
1
3 years ago
#16
(Original post by SilentStudent.)
4 marks
Thanks! Was that including finding the value of k as well?
0
3 years ago
#17
(Original post by SilentStudent.)
4 marks
For expansion and I think 3 for the value of K
0
#18
(Original post by sportyegg)
Btw does anyone remember how many marks the binomial question was worth?
7 marks
0
3 years ago
#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
6
3 years ago
#20
Cheers
(Original post by shivalakhani)
7 marks
1
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