# Edexcel Maths A level Core 1 Unofficial Markscheme May 15th 2019 Watch

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C1 EDEXCEL 2019 UNOFFICIAL MARKSCHEME

1a) 63

1b) 5+2root 6

2) 32-4c, c=5 so sum of first 4 terms= 140

3) proof that the curve and line dont intersect- b^2-4ac<0, cant square root a negative value(-7)

4)intergration- c= 8/9

5)diferentiation question when d^2y/dx^2 = 9, value was 44 i think?

6)equation of line gradient was -3/2??, lenght was root 13 t=7/4, and i got something dumb for the area

7) arithmentic series q- 400,8000, d=12, 17th year for jack- 208

8) graph intersection question where gradient is eqaul/ parallel idk point b- (3,9), point c- (-3,1)

9) graph q pretty straight forward, had to remeber to add in y and x intercepts

k=-4, a was 1

Cant remember one of the qs lol

1a) 63

1b) 5+2root 6

2) 32-4c, c=5 so sum of first 4 terms= 140

3) proof that the curve and line dont intersect- b^2-4ac<0, cant square root a negative value(-7)

4)intergration- c= 8/9

5)diferentiation question when d^2y/dx^2 = 9, value was 44 i think?

6)equation of line gradient was -3/2??, lenght was root 13 t=7/4, and i got something dumb for the area

7) arithmentic series q- 400,8000, d=12, 17th year for jack- 208

8) graph intersection question where gradient is eqaul/ parallel idk point b- (3,9), point c- (-3,1)

9) graph q pretty straight forward, had to remeber to add in y and x intercepts

k=-4, a was 1

Cant remember one of the qs lol

(Original post by

This is the AS paper C1 Edexcel May 15th

**Yolotwice**)This is the AS paper C1 Edexcel May 15th

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#2

(Original post by

C1 EDEXCEL 2019 UNOFFICIAL MARKSCHEME

1a) 63

1b) 5+2root 6

2) 32-4c, c=5 so sum of first 4 terms= 140

3) proof that the curve and line dont intersect- b^2-4ac<0, cant square root a negative value(-7)

4)intergration- c= 8/9

5)diferentiation question when d^2y/dx^2 = 9, value was 44 i think?

6)equation of line gradient was -3/2??, lenght was root 13 t=7/4, and i got something dumb for the area

7) arithmentic series q- 400,8000, d=12, 17th year for jack- 208

8) graph intersection question where gradient is eqaul/ parallel idk point b- (3,9), point c- (-3,1)

9) graph q pretty straight forward, had to remeber to add in y and x intercepts

k=-4, a was 1

Cant remember one of the qs lol

**sdx47x**)C1 EDEXCEL 2019 UNOFFICIAL MARKSCHEME

1a) 63

1b) 5+2root 6

2) 32-4c, c=5 so sum of first 4 terms= 140

3) proof that the curve and line dont intersect- b^2-4ac<0, cant square root a negative value(-7)

4)intergration- c= 8/9

5)diferentiation question when d^2y/dx^2 = 9, value was 44 i think?

6)equation of line gradient was -3/2??, lenght was root 13 t=7/4, and i got something dumb for the area

7) arithmentic series q- 400,8000, d=12, 17th year for jack- 208

8) graph intersection question where gradient is eqaul/ parallel idk point b- (3,9), point c- (-3,1)

9) graph q pretty straight forward, had to remeber to add in y and x intercepts

k=-4, a was 1

Cant remember one of the qs lol

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#3

**sdx47x**)

C1 EDEXCEL 2019 UNOFFICIAL MARKSCHEME

1a) 63

1b) 5+2root 6

2) 32-4c, c=5 so sum of first 4 terms= 140

3) proof that the curve and line dont intersect- b^2-4ac<0, cant square root a negative value(-7)

4)intergration- c= 8/9

5)diferentiation question when d^2y/dx^2 = 9, value was 44 i think?

6)equation of line gradient was -3/2??, lenght was root 13 t=7/4, and i got something dumb for the area

7) arithmentic series q- 400,8000, d=12, 17th year for jack- 208

8) graph intersection question where gradient is eqaul/ parallel idk point b- (3,9), point c- (-3,1)

9) graph q pretty straight forward, had to remeber to add in y and x intercepts

k=-4, a was 1

Cant remember one of the qs lol

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#4

Differentiation question being 44? I don't even remember what I put but I don't think I got that

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#5

Yeah I don't remember 44 either...

(Original post by

Differentiation question being 44? I don't even remember what I put but I don't think I got that

**dumbasslmao**)Differentiation question being 44? I don't even remember what I put but I don't think I got that

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#6

(Original post by

Yeah I don't remember 44 either...

**Mackenziekav**)Yeah I don't remember 44 either...

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#7

Oh yeah I did get that nvm 😂😂

(Original post by

I think it was the d^2y/dx^2 the last part it was like -1 +45 = 44

**H.Ash999**)I think it was the d^2y/dx^2 the last part it was like -1 +45 = 44

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(Original post by

Q2 or 3 - inequalities question the one with -1/2 in it

**H.Ash999**)Q2 or 3 - inequalities question the one with -1/2 in it

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#9

Are we 100% sure t=7/4 because I got that but for AC to equal BC i thought it had to be between 3 and 5

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#10

are you sure about q8? Because I got x = +-9 and a fraction for y? And it all worked out? and how did you work out t? For some reason I got 4/7 but it took me ages getting there lol

(Original post by

C1 EDEXCEL 2019 UNOFFICIAL MARKSCHEME

1a) 63

1b) 5+2root 6

2) 32-4c, c=5 so sum of first 4 terms= 140

3) proof that the curve and line dont intersect- b^2-4ac<0, cant square root a negative value(-7)

4)intergration- c= 8/9

5)diferentiation question when d^2y/dx^2 = 9, value was 44 i think?

6)equation of line gradient was -3/2??, lenght was root 13 t=7/4, and i got something dumb for the area

7) arithmentic series q- 400,8000, d=12, 17th year for jack- 208

8) graph intersection question where gradient is eqaul/ parallel idk point b- (3,9), point c- (-3,1)

9) graph q pretty straight forward, had to remeber to add in y and x intercepts

k=-4, a was 1

Cant remember one of the qs lol

**sdx47x**)

C1 EDEXCEL 2019 UNOFFICIAL MARKSCHEME

1a) 63

1b) 5+2root 6

2) 32-4c, c=5 so sum of first 4 terms= 140

3) proof that the curve and line dont intersect- b^2-4ac<0, cant square root a negative value(-7)

4)intergration- c= 8/9

5)diferentiation question when d^2y/dx^2 = 9, value was 44 i think?

6)equation of line gradient was -3/2??, lenght was root 13 t=7/4, and i got something dumb for the area

7) arithmentic series q- 400,8000, d=12, 17th year for jack- 208

8) graph intersection question where gradient is eqaul/ parallel idk point b- (3,9), point c- (-3,1)

9) graph q pretty straight forward, had to remeber to add in y and x intercepts

k=-4, a was 1

Cant remember one of the qs lol

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#11

Does anyone remember how many marks question 3 was? Instead of using b^2-4ac I equated the equations

Last edited by Dez; 1 month ago

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#12

(Original post by

are you sure about q8? Because I got x = +-9 and a fraction for y? And it all worked out? and how did you work out t? For some reason I got 4/7 but it took me ages getting there lol

**ColtonH5364**)are you sure about q8? Because I got x = +-9 and a fraction for y? And it all worked out? and how did you work out t? For some reason I got 4/7 but it took me ages getting there lol

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#13

ColtonH5364

So A was (5,8) and B was (3,11) and AC=BC and the point C is (t,8) so:

5-t = (square root) (11-8)(squared) + (3-t)(squared)

5-t = (square root) (9)+(9-6t+t(squared))

5-t = (square root) (18 - 6t + t(squared))

(5-t)(squared) = (18 -6t + t(squared))

(25- 10t +t(squared)) = (18 -6t + t(squared))

Therefore 25-18 = -6t + 10t

So 7 = 4t

t= 7/4

So A was (5,8) and B was (3,11) and AC=BC and the point C is (t,8) so:

5-t = (square root) (11-8)(squared) + (3-t)(squared)

5-t = (square root) (9)+(9-6t+t(squared))

5-t = (square root) (18 - 6t + t(squared))

(5-t)(squared) = (18 -6t + t(squared))

(25- 10t +t(squared)) = (18 -6t + t(squared))

Therefore 25-18 = -6t + 10t

So 7 = 4t

t= 7/4

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#14

(Original post by

Does anyone remember how many marks question 3 was? Instead of using b^2-4ac I equated the equations

**Maarlo**)Does anyone remember how many marks question 3 was? Instead of using b^2-4ac I equated the equations

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#15

**sdx47x**)

C1 EDEXCEL 2019 UNOFFICIAL MARKSCHEME

1a) 63

1b) 5+2root 6

2) 32-4c, c=5 so sum of first 4 terms= 140

3) proof that the curve and line dont intersect- b^2-4ac<0, cant square root a negative value(-7)

4)intergration- c= 8/9

5)diferentiation question when d^2y/dx^2 = 9, value was 44 i think?

6)equation of line gradient was -3/2??, lenght was root 13 t=7/4, and i got something dumb for the area

7) arithmentic series q- 400,8000, d=12, 17th year for jack- 208

8) graph intersection question where gradient is eqaul/ parallel idk point b- (3,9), point c- (-3,1)

9) graph q pretty straight forward, had to remeber to add in y and x intercepts

k=-4, a was 1

Cant remember one of the qs lol

- Q1 - 1, 4
- Q2 - 3, 2, 1
- Q3 - 4
- Q4 - 1, 6
- Q5 - 2, 4, 1
- Q6 - 8
- Q7 - 4, 2, 3, 2
- Q8 - 2, 2, 5
- Q9 - 5, 5
- Q10 - 6, 2

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#17

erm 68 for an A i would say very easy paper in my humble opinion, which is very upsetting considering last year and all

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#19

**sdx47x**)

C1 EDEXCEL 2019 UNOFFICIAL MARKSCHEME

1a) 63

1b) 5+2root 6

2) 32-4c, c=5 so sum of first 4 terms= 140

3) proof that the curve and line dont intersect- b^2-4ac<0, cant square root a negative value(-7)

4)intergration- c= 8/9

5)diferentiation question when d^2y/dx^2 = 9, value was 44 i think?

6)equation of line gradient was -3/2??, lenght was root 13 t=7/4, and i got something dumb for the area

7) arithmentic series q- 400,8000, d=12, 17th year for jack- 208

8) graph intersection question where gradient is eqaul/ parallel idk point b- (3,9), point c- (-3,1)

9) graph q pretty straight forward, had to remeber to add in y and x intercepts

k=-4, a was 1

Cant remember one of the qs lol

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