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# Edexcel A2 C4 Mathematics June 2015 - Official Thread Watch

1. i didnt even finish some parts! like 2 parts!
2. (Original post by Iridann)
Nah it was 13pi/ln3
Yes that's what I got!
3. (Original post by cfcdrog)
For Q6 b) was it 4pi/3 + 2root3/4
Yep
4. How did people get the cartesian equation from parametric? I couldn't get x-3 in the denominator
5. Unofficial mark scheme anyone?
6. (Original post by unreasonableman)
Yes, I ballsed up the differentials question but hopefully I will have gained the marks everyone else lost on the the substitution. 13pi/ln3 anyone else?

ME!
7. (Original post by Ripper Phoenix)
used radians got 0.2 something sounds logical tho! 0.2 years thats like a few months perfect
8. (Original post by anndz3007)
How you intergrade 9^2x, i put u= 9^x
3^2x not 9^2x

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9. Not a bad exam at all! Last question was a little tricky. For the question which asks for your answer in terms of ln2, did anyone get a quadratic in terms of ln2?
10. (Original post by Random1357)
Yep
what was 6b again? I don't remember getting this answer in my paper
11. (Original post by jf1994)
How did people get the cartesian equation from parametric? I couldn't get x-3 in the denominator
I think it was x^2 +2x-5 all over x-3...anyone got that?
12. 13pi/ln(2)
13. what do you guys think the grade boundary will be like for an A*?
14. unofficial mark scheme?
15. (Original post by jf1994)
I think I may have messed up the question where you had to use the substitution to find the area underneath the curve, I ended up a negative value? I just cancelled the negative sign cos it's an area and was hoping to go back to it but I ran out of time
I got this too but had no clue why.
16. (Original post by jf1994)
How did people get the cartesian equation from parametric? I couldn't get x-3 in the denominator
the nominator is sth like x^2+2x-5
17. That was a pretty nice paper. I messed up in a couple of places though, that was a shame. Should hopefully still be an A*
18. (Original post by rory58824)
Not a bad exam at all! Last question was a little tricky. For the question which asks for your answer in terms of ln2, did anyone get a quadratic in terms of ln2?
Yep!
19. (Original post by cfcdrog)
I think it was x^2 +2x-5 all over x-3...anyone got that?
Yeah
20. (Original post by Jack22345)
3^2x not 9^2x

Posted from TSR Mobile
What method did you use, i used subsititution u= 3^x, is that right

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