Edexcel AS Maths Paper 1 8MA0 Unofficial Markscheme 2019 Watch

bellell
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#21
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#21
(Original post by MrRhino)
If only it had been a real fire in further maths instead and your paper burnt XD
That would've been nice
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Pepperoni-lover
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#22
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(Original post by itskxmil)
60% for a C
Is that grade boundary just for paper 1 or for both paper 1 and paper 2
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Dan7547556
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#23
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#23
Are u sure that’s right for 1b or am I forgetting the answer
(Original post by ak113)
1. a) find m when both lines are perpendicular, m=2
b)find x coordinate of intercepts (x=-5/2)

2. two equations to solve First was a=1/4?
second was definitely ±√2

Forgot the order so here are some of my answers:

Question on circles (centre of 2,-4) and radius of √28
the line x=k intersected at a tangent, find exact values of k, k=±√2
part c) was 2±2√7 or something like that

Queston on factorisation:
a) Prove (x-4) is a factor
b) prove the curve has two distinct roots (got x-4 as a repeated root) and -3/2 as the other root
c) Suggest the number of roots the graph f(x) - 2 had, should be three root as graph is translated by vector
(0, 2)

d)Find the value of k when f(x+k) crosses the orgin got k=4 which translated 4 to the left, or k=-3/2 which moves it 1.5 to the right

Question on trig:
a) Show that x = 2√3 when the area of the triangle is 18
b) Second question, find the length of AB, which was √84, simplifies to 2√21

Other trig question:
a) Had to show that a trig identity equals to -5cosx+4

b) solve to get tan=-5/3. Solutions are 301 and something 121

Question on quadratics with tin as a model of a quadratic
a) Find the value when n=1
b) State the max amount of tin they could mine
c) When n=4, as the year is 2023
d) Limitation of the model

Question on definitve integrals:
Had to find the x- coordinate for when x is a minimum. X=4
You then had to use this value and x=0 as your limits to differentiate the curve to get 256/3

Question on linear modelling about trees and their height and time
a) Find the relationship between H and t

H=0.31t+1.42

b) The original height was 140 cm = 1.4m, comment on the suitability of the model

Proof:
prove n³+2 is not divisble by 8.
I proved it by counter example and when n=2n (an even number) and when n=(2n+1) an odd number and got an expression that was not wholly divisible by 8

Question on exponentials, initial value was like 5700+2300 = 8000
part b differential the exponent to get what they asked
part c, find the time when it is valued at £500, got 8 years 3 months
d) limitation of the model

Last question on vectors:
a) state what is meant by non-zero or something to that extent

b)

|a + b| = |a| + |b|

m = |6| and |m-n|=3 and the angle between them is 30, had to find the angle between |m| and |n|

I got 15 degrees using the sin rule, however some people an angle of 135, which is 180-(15+30)
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Unicornstudent
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#24
You are right coz it was in 2023 not until and I asked teachers and the said the same thing
(Original post by cmuld)
For the tin question part C I think they asked you to find the amount of tin mined in 2023, as opposed to the part A which was up to 2020 or whatever. So you had to do the equation for n+1 (5) and subtract it with n (4). At least this is what I did? Saw it was a 2 mark and re read the question and spotted it was differently worded
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josephryanaustin
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#25
Did you get 99 as the ans?
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Chelsea Kaye
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#26
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#26
Think I got a different one for 1b too
(Original post by Dan7547556)
Are u sure that’s right for 1b or am I forgetting the answer
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veesecake
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#27
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#27
is this for the question about the car? you had to give your answer in years and months, rounded to the nearest month i think
(Original post by josephryanaustin)
Did you get 99 as the ans?
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itskxmil
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#28
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#28
Well it was -2.5 or -5/2
(Original post by Chelsea Kaye)
Think I got a different one for 1b too
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rvlreveal
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#29
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#29
How did everyone find it?
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ak113
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#30
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#30
what value did you get, im pretty sure its -5/2, did it like 3 times in the exam
(Original post by Chelsea Kaye)
Think I got a different one for 1b too
Last edited by ak113; 1 week ago
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elidamonj
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#31
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#31
Tough. Let's just hope the grade boundaries are not high
(Original post by rvlreveal)
How did everyone find it?
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ItsEuan
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#32
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#32
vector question, part a: it wants you to say that they have to be parallel
(Original post by ak113)
1. a) find m when both lines are perpendicular, m=2
b)find x coordinate of intercepts (x=-5/2)

2. two equations to solve First was a=1/4?
second was definitely ±√2

Forgot the order so here are some of my answers:

Question on circles (centre of 2,-4) and radius of √28
the line x=k intersected at a tangent, find exact values of k, k=±√2
part c) was 2±2√7 or something like that

Queston on factorisation:
a) Prove (x-4) is a factor
b) prove the curve has two distinct roots (got x-4 as a repeated root) and -3/2 as the other root
c) Suggest the number of roots the graph f(x) - 2 had, should be three root as graph is translated by vector
(0, 2)

d)Find the value of k when f(x+k) crosses the orgin got k=4 which translated 4 to the left, or k=-3/2 which moves it 1.5 to the right

Question on trig:
a) Show that x = 2√3 when the area of the triangle is 18
b) Second question, find the length of AB, which was √84, simplifies to 2√21

Other trig question:
a) Had to show that a trig identity equals to -5cosx+4

b) solve to get tan=-5/3. Solutions are 301 and something 121

Question on quadratics with tin as a model of a quadratic
a) Find the value when n=1
b) State the max amount of tin they could mine
c) When n=4, as the year is 2023
d) Limitation of the model

Question on definitve integrals:
Had to find the x- coordinate for when x is a minimum. X=4
You then had to use this value and x=0 as your limits to differentiate the curve to get 256/3

Question on linear modelling about trees and their height and time
a) Find the relationship between H and t

H=0.31t+1.42

b) The original height was 140 cm = 1.4m, comment on the suitability of the model

Proof:
prove n³+2 is not divisble by 8.
I proved it by counter example and when n=2n (an even number) and when n=(2n+1) an odd number and got an expression that was not wholly divisible by 8

Question on exponentials, initial value was like 5700+2300 = 8000
part b differential the exponent to get what they asked
part c, find the time when it is valued at £500, got 8 years 3 months
d) limitation of the model

Last question on vectors:
a) state what is meant by non-zero or something to that extent

b)

|a + b| = |a| + |b|

m = |6| and |m-n|=3 and the angle between them is 30, had to find the angle between |m| and |n|

I got 15 degrees using the sin rule, however some people an angle of 135, which is 180-(15+30)
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aidannn.lko
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#33
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#33
(Original post by cmuld)
For the tin question part C I think they asked you to find the amount of tin mined in 2023, as opposed to the part A which was up to 2020 or whatever. So you had to do the equation for n+1 (5) and subtract it with n (4). At least this is what I did? Saw it was a 2 mark and re read the question and spotted it was differently worded
yeh thats right, came out as 93 i think?
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ItsEuan
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#34
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#34
99/160 for an a

(Original post by itskxmil)
60% for a C
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ItsEuan
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#35
how are people finding FM so hard, it was easier than 2018 paper
(Original post by bellell)
That would've been nice
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itskxmil
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#36
FM was awful
(Original post by ItsEuan)
how are people finding FM so hard, it was easier than 2018 paper
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Rajvirdulai09
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#37
Wasn't it find the length of bc not ab for the trig question
Last edited by Rajvirdulai09; 1 week ago
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elidamonj
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#38
did anyone do the proofing question at the end? if so, how did you do it?
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Mattttttyyyy
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#39
(Original post by Rajvirdulai09)
Wasn't it find the lengthy of bc not ab for the trig question
Hope so as thats what I did
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MrRhino
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#40
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#40
(Original post by ItsEuan)
how are people finding FM so hard, it was easier than 2018 paper
What exam board? We were talking about OCR MEI B
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