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# Edexcel 2016 Core 4 - Model Solutions (1-6, Will complete after gym)

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1. http://www.thestudentroom.co.uk/show...5#post66085535
Attached Images
2. core420161.pdf (172.5 KB, 164 views)
3. Shouldn't t= pie/4 for both X and y? Thanks for the solution btw. Can't wait to see solution for Q7 and 8.
I think I have made some mistakes in the last 2 questions.
4. (Original post by angela06)
Shouldn't t= pie/4 for both X and y? Thanks for the solution btw. Can't wait to see solution for Q7 and 8.
I think I have made some mistakes in the last 2 questions.
No, The original function was
5. (Original post by MathsAndChess)
I have produced some model solutions for the C4 today.
If there are typos, let me know, their are always typos.
I will complete the last two questions at gym, Latexing these solutions took too long, but it was fun.
Enjoy!
#

How many marks was question 5?
6. (Original post by MathsAndChess)
I have produced some model solutions for the C4 today.
If there are typos, let me know, their are always typos.
I will complete the last two questions at gym, Latexing these solutions took too long, but it was fun.
Enjoy!
can u explain how i got c to be equal to -720
7. (Original post by iBall)
#

How many marks was question 5?
I left the actual paper in my locker. I think it was 9
8. (Original post by jamessmith15)
can u explain how i got c to be equal to -720
Which question?
9. (Original post by MathsAndChess)
I left the actual paper in my locker. I think it was 9
for the parametric say I integated tant by accident but continued to wok everythimg throughout how many marks would I have lost>
10. (Original post by iBall)
for the parametric say I integated tant by accident but continued to wok everythimg throughout how many marks would I have lost>
I'd say 4, if you used your correctly.
11. (Original post by MathsAndChess)
I'd say 4, if you used your correctly.
I hope so man, I got every other mark. Are you familiar with this type of error?

Also how many marks was each part? My methods were fine it was literally one step
12. (Original post by iBall)
I hope so man, I got every other mark. Are you familiar with this type of error?

Also how many marks was each part? My methods were fine it was literally one step
I think it was 5 and 4.
13. (Original post by jamessmith15)
can u explain how i got c to be equal to -720
question 4 mate
14. (Original post by jamessmith15)
question 4 mate
There isn't a -720, Do you mean ??
15. (Original post by MathsAndChess)
There isn't a -720, Do you mean ??
yes I'm asking if you know how i got -720 instead of that
and how many marks i will have lost
16. (Original post by jamessmith15)
yes I'm asking if you know how i got -720 instead of that
and how many marks i will have lost
i think if i remember correctly i ended up with an equation of
-1/5x^2=t-720
17. (Original post by jamessmith15)
i think if i remember correctly i ended up with an equation of
-1/5x^2=t-720
Look at my solution.
18. (Original post by MathsAndChess)
Look at my solution.
i think its because i had the x ontop of the fraction instead of the bottom.
How many marks do u think i will loose?
i ended up with a final answer of:
x= root (-5t +3600)
20. (Original post by nxp790)
http://www.thestudentroom.co.uk/show....php?t=4185241

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