FP3 Edexcel A level June 25th 2018 Unofficial Markscheme

I don't know what happened to me during the exam, for the matrix question I subtracted 3 from every element in part a and not just the elements on the leading diagonal.

In the last 3 minutes I realised, scribbled a lot of stuff quickly. Couldn't even start part c, but for part a where you were meant to get 3k = 6, I got k = 6 (due to the rush) and then used this incorrect value of k to get the equation of lambda like $(3 - \lambda)(\lambda^{2} - 2\lambda - 6) - 12 + 4\lambda = 0$. I know all of it is incorrect answers etc.

But how many marks do you think I can pick up on this question. For part a I hope I got at least 1 or 2 out of 3. And would they apply M1s even with an incorrect value of k in the expression?

Rest of the question paper was fine save for this brain fade, and S2 was a 40 minute joke too.

My answers:
1. Proof
2. a) x = 0.5 Ln(11)
b/c) pie(15 -11/4Ln(11))
3. a) k =2
b) Other eigenvalues where 2 and -1 I think
c) Eigenvector = (4 -1 1)
4. 1.5 -5/8 Ln(5)
5. a) Reduction formulae show that question p=2 ad q = 16
b)((Around 90000)/105) *root(2)
6. a)Show that the lines are not perpendicular and do not intersect
b) 47root(6)/30
c) 44x -24y+10z = 61 for cartesian equation
7. d) c^2 = 25m^2+16
e) Area = 20

Please tell me if any are wrong

I know I realised I was wrong but how many marks do you think I'll get for part b ft wih incorrect value of k

My answers:
1. Proof
2. a) x = 0.5 Ln(11)
b/c) pie(15 -11/4Ln(11))
3. a) k =2
b) Other eigenvalues where 2 and -1 I think
c) Eigenvector = (4 -1 1)
4. 1.5 -5/8 Ln(5)
5. a) Reduction formulae show that question p=2 ad q = 16
b)((Around 90000)/105) *root(2)
6. a)Show that the lines are not perpendicular and do not intersect
b) 47root(6)/30
c) 44x -24y+10z = 61 for cartesian equation
7. d) c^2 = 25m^2+16
e) Area = 20

Please tell me if any are wrong

Pretty sure I agree with all of these, from what I can remember anyway

Did anyone else get 41x

Did anyone else get 41x

I don't know what happened to me during the exam, for the matrix question I subtracted 3 from every element in part a and not just the elements on the leading diagonal.

In the last 3 minutes I realised, scribbled a lot of stuff quickly. Couldn't even start part c, but for part a where you were meant to get 3k = 6, I got k = 6 (due to the rush) and then used this incorrect value of k to get the equation of lambda like $(3 - \lambda)(\lambda^{2} - 2\lambda - 6) - 12 + 4\lambda = 0$. I know all of it is incorrect answers etc.

But how many marks do you think I can pick up on this question. For part a I hope I got at least 1 or 2 out of 3. And would they apply M1s even with an incorrect value of k in the expression?

Rest of the question paper was fine save for this brain fade, and S2 was a 40 minute joke too.

I think it was like 44x +?y+10z =61

What do you think will be the marks for 80 ums?

What do you think will be the marks for 80 ums?

post your answers here and i’ll edit
q1) prove tanh(x) in exponential form
prove artanh(x)=0.5ln(1+x/1-x)

integral question) p=2, q= 16
Answer of I2= 97232/105 (sqrt2) fraction may b wrong

volume of revolution question) integrate from 0 to 1, sqrt(4x^2+5)dx

=5pi/4 (ln(sqrt5)+6/5)

matrix question) k=2

vector question) prove that the lines are skew, by showing that they are not parallel, and do not intersect


ellipse q7) a^2= 25, b^2= 16, e=3/5
minimum area of triangle= 20



GRADE BOUNDARY PREDICTIONS:
70/75 for 90UMS

I think alot of ppl found this paper hard it was like the IAL 2017 f3 (A* was 61) i would not be surprised if they did 66 for an A* and about 59 for an A

My guess would be mid to high 50s with low to mid 60s as 90 - everyone I've spoken to found it very difficult and numerous people didn't even finish