# edexcel C2 23rd May 2018 unofficial mark schemeWatch

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1 year ago
#41
For 1 b was it not 51.412?
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1 year ago
#42
Can someone explain to me in detail, how they did 9c? I got a and b right, for my square area, I got 700, then my integrated area was 410.9. And my are for R ended up as 290.1, how?
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1 year ago
#43
Wow edexcel really made up for the c1 paper, fricking great paper this was
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1 year ago
#44
(Original post by J0skin)
For the geometric I got a = 1000 as s=a/1-r so 1-r = 0.1?
I got this too, pretty sure it’s correct?
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1 year ago
#45
(Original post by urmumgey)
Can someone explain to me in detail, how they did 9c? I got a and b right, for my square area, I got 700, then my integrated area was 410.9. And my are for R ended up as 290.1, how?
integreate from 25/4 and 4, find rectangle area and minus it from the integral value, and boom
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1 year ago
#46
Wasn’t 8 ii) in degrees??
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1 year ago
#47
(Original post by urmumgey)
Can someone explain to me in detail, how they did 9c? I got a and b right, for my square area, I got 700, then my integrated area was 410.9. And my are for R ended up as 290.1, how?
If A was (4,112), B was (6.25,0) The rectangle will end up as 112 x 2.25 = 252, you then take away the integrated area, to give 79.77
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1 year ago
#48
What were the values they gave you in 1.a?
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1 year ago
#49
(Original post by tayreed)
I got this too, pretty sure it’s correct?
no as r is -0.9 so 1-(-0.9) is 1.9
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1 year ago
#50
Do u remember how many marks for Q1？
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1 year ago
#51
(Original post by NoahLeo)
How do you do 7a) ?
Log1.01(500) = y-1 = 624.5629...
Y= 625.56 (2dp)
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1 year ago
#52
What was the (2,2) part from the first question for????

I cant remember XD
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1 year ago
#53
(Original post by OriginalOnur)
Wow edexcel really made up for the c1 paper, fricking great paper this was
It was so good I finished in under an hour.
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1 year ago
#54
(Original post by IgnoreMyName)
Im pretty sure With A at 19,000, R=-0.9 and the sum of the first 12 terms, putting them together into the equation, you get 12824.29356. Not the 7,176 whatever you wrote..
6c) Is surely wrong, because i keep plugging it in, and i get the same 12,824 not 7176
This is right
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1 year ago
#55
How did you find A in the last question?
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1 year ago
#56
(Original post by tayreed)
I got this too, pretty sure it’s correct?
It's 1-(-0.9) so it's
10000 = a/1.9
a = 19000
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1 year ago
#57
(Original post by OriginalOnur)
Wow edexcel really made up for the c1 paper, fricking great paper this was
C1 was awesome as well the only question I got wrong was the Kim and Andy question or whatever his name was :/
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1 year ago
#58
(Original post by aminmoh)
integreate from 25/4 and 4, find rectangle area and minus it from the integral value, and boom
Oh my god I’m so dumb, I integrated between 0 and 25/4... Must of been nerves, pretty sure I got everything else right though so hoping for an A
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1 year ago
#59
Does anyone have the marks for each
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1 year ago
#60
(Original post by katie.2594)
It was so good I finished in under an hour.
Ikr, went over it like 3 times
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