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# OCR MEI FP1 Thread - AM 20th May 2016

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1. (Original post by chemari1)
Yep
2. (Original post by thebearissquare)
Think question 7 was about the roots, what did you get for alpha x beta?
-1
3. (Original post by Crozzer24)
For the inverse of B was it 1/25(A)
Yeah I got that
4. (Original post by XenoMJ)
I got 0.00813 3.S.F
Oh, yes I did get that. Double zero, yes, my bad.
5. (Original post by XenoMJ)
I got 0.00813 3.S.F
same
6. (Original post by xX-MikeHunt-Xx)
Yep
in question 5 how many marks will I have got by plotting C1 right only? and what question asked about what the value converged to as x tended to infinity? pplus was the answer 0?
Not sure about the double zero. I got one zero.
I got double zero. I got it as 8.13 to the power of 10^-3

I forgot to halve the area in 1, and started writing 3/2 instead of 2/3 in 9 but apart from that it was alright
9. Hardly bad, only lost at least 20 marks...
10. (Original post by Crozzer24)
Think I've been stupid and left the answer to the last question as 0.00816 or something? Didn't realise 0's at the front classed as sig figs lol
The zeroes don't, I got 0.00813 I think?
11. (Original post by XenoMJ)
I got 0.00813 3.S.F
same
12. How do you do q4, when coefficient of n^4 = n^3?
13. (Original post by lfcjatt)
How do you do q4, when coefficient of n^4 = n^3?
you hAD TO WORK OUT THE COEFFICIENT OF N^4, Which I think was 1/2 (sorry for the caps) then work out the coefficient of n^3 in terms of p, and solve that as an equation.
I think my final answer was p=3/2, but I can't really remember
14. Multiply the brackets out and work out coefficients of n^3 in terms of p then work out p
15. MEI can go slip in the shower, die in a fire and burn in a hole
16. Anyone remember the mark-split for the individual parts of q7? Roots of the polynomial eq'n.

I did alpha*beta*given root*complex conjugate = -b/a
I got that p = 3/2 and I think another answer might have been -1 ??

If someone could post the question+answers would be v grateful
17. (Original post by TillSoft)
you hAD TO WORK OUT THE COEFFICIENT OF N^4, Which I think was 1/2 (sorry for the caps) then work out the coefficient of n^3 in terms of p, and solve that as an equation.
I think my final answer was p=3/2, but I can't really remember
How did you get the coefficient of n^4? and was the coefficient of n^3 = 2?

i got p=+/-sqrt(2) or something like that :/

not sure what i did then lol
18. (Original post by Duskstar)

I forgot to halve the area in 1, and started writing 3/2 instead of 2/3 in 9 but apart from that it was alright
the asymptote was 1
19. For Qs 7 i think, how did you calculate alpha x beta. I didn't get that and so couldn't really do the rest of the qs and find A and B and then the w/j bit. I've done all the fp1 past papers and there has been nothing like this qs before. Also the series method of differences qs (i think it was near the end, honestly can't remember anymore) was a toughie, i think I may have gotten partly there but still hard
20. (Original post by lfcjatt)
How do you do q4, when coefficient of n^4 = n^3?

as the formula I think. The coefficient on is if you multiply it out, and the coefficient on is given by multiplying by matching up terms in either bracket to get terms.

Set and solve for .

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