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edexcel C2 23rd May 2018 unofficial mark scheme

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
(edited 5 years ago)

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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
Isn’t 3(d) 24x^2, not 29x^2?
Reply 3
8ii) Isn’t 6.03 another value?
Original post by sportyegg
Isn’t 3(d) 24x^2, not 29x^2?

IT IS :wink:
Original post by shivalakhani
IT IS :wink:


Haha I see those sly movements
(edited 5 years ago)
Original post by Tojsagay
8ii) Isn’t 6.03 another value?


No as its less than 2pi
Reply 7
According to JAY PATEL SEM your wrong
Reply 8
Original post by gymcattaylah
I got all the same!!


you're wrong NOOB
Original post by sdcvbvn
According to JAY PATEL SEM your wrong

YOU'RE
I reckon grade boundaries will be high this year since apparently C1 and M3 were also easy papers
Btw does anyone remember how many marks the binomial question was worth?
Reply 12
Original post by shivalakhani
YOU'RE


According to JAYPATELSEM you're wrong
please follow petal
Original post by sportyegg
Btw does anyone remember how many marks the binomial question was worth?


4 marks
For the circle question can you leave the radius as Root 50?
Original post by SilentStudent.
4 marks


Thanks! Was that including finding the value of k as well?
Original post by SilentStudent.
4 marks

For expansion and I think 3 for the value of K
Original post by sportyegg
Btw does anyone remember how many marks the binomial question was worth?


7 marks
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
Cheers
Original post by shivalakhani
7 marks
(edited 5 years ago)

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